I think it's very possible, speaking as someone on the spectrum themselves. What exactly can we do to make you feel supported?

here's my thoughts (from what you said, which is likely limited - it is definitely possible):

The only thing that you mentioned that very specifically makes me think “autism” is the sensory processing stuff (which can also be a separate thing, sensory processing disorder). Is all of that new? If so, have you always felt that way but been able to hide it or something? Because if it is autism then it’s more likely that you’ve just started noticing. 

The first could be related (alexithymia i think). The third possibly. However, if that’s all of the things, maybe it could be more depression or anxiety or some other mental health thing?

What parts of autistic characters do you relate to? I will say that often I think autistic characters by autistic authors don’t always have a lot of symptoms, or that it really comes in much. But that might be more realistic for a really higher masking/functioning (ik it’s not great labels but) person??? 

Do you have any special interests or hyperfixations? Things that you’re very passionate about? Do you need routines or things to go the same way (for instance things like you like to wear the same clothes or use the same dishes or you do things a certain way like eating things in a certain order, which are just examples? also this would usually be more of a need and you'll panic and probably meltdown if it doesn't work, or at least it's that way for me, but it could definitely be more of a "like to" thing, though at that point i'd question if it's relateed. Not discount it, but could is it autistic or just that you like to do it that way, if that makes sense. it could be both or unclear. or maybe it'd just make you a bit uncomfortable and you can deal with it. idk, there's a lot of different ways to be autistic)? What about stimming (idk how to explain it)? Or communication difficulties? Or masking? Coordination issues? These are just examples, it’s okay if you don’t know yet, it’s just there isn’t much that you mentioned that doesn’t sound like it could be something like depression, though you could have both. also it's possible you might not have one but maybe you have others, and you could still be autistic.

anyway if you have more thoughts/questions i'll try to answer. i feel like this comment is disjointed and hard to read but sometimes i can't read well that could be it; sorry if it is XD

Hey there. Bit late on this but yeah it sounds like you could be autistic. A good thing to start reading is try and find blogs written by autistic people (and for the love of all things holy, avoid Autism Speaks, not a good company at all.)

As someone who has struggled with this very fact, let me tell you, self diagnosis is VERY valid. I am self diagnoised due to the fact that we have no good doctors around here that would see the signs. 

Sadly I can't offer any help on trying to tell your parents besides maybe trying to write a letter to them? I did that with mine, I wrote down some of the symptoms and how they affected me. I was still a shaking nervous wreck though, Can't fix that, I suppose.

It's a lot to process! I know it took me a while to let it all sink in. Don't try to rush it and tell people when you're ready. 

OK, as a neurodivergent person, here are my thoughts:

- Many autistic characters in TV shows may not nessecarily be accurately portrayed, or exaggergated. In your example, you gave an autistic character standing there, emotionless, not knowing what to feel after a tragic event. A common misconception is that autistics have a hard time feeling empathy or sympathy. This is not true. All they have a hard time with is on how to express that empathy or sympathy in a way that is socially acceptable. If it is something different than that chances are either you, or the character, or both also experience some other challenge unrelated to autism.

- Autism is often misdiagnosed in place of other things. This is why self-diagnosis is never a good idea. For a while last year I thought I had autism, but when I went to an assessment psychologist (I took the IQ and other assessment tests months apart for no particular reason), the results came back that I was not autistic, but simply had very high IQ combined with other symptoms that SIMULATED autism. It still counts as neurodivergence, as for example I have a hard time understanding social cues and can easily be manipulated, but the test result has the final word and I'm not autistic. It's possible I am autistic but it missed me, but the only tests for autism that are missed in people are only for people aged 16 and up, so I'll need to wait until there. This is just my experience, it may be different for you, but that's just something to point out.

- Even if you are not autistic there are things that can help. I for example get very fidgety during my online Zoom classes so my parents got me a few fidget toys to help with stress and to have something to do whilst I'm bored. Additionally I sometimes carry around earplugs for loud noises and try to avoid loud parties or restaurants blasting pop music. You mentioned sensitivity to noises. This is one thing we relate on. I find that if you can't avoid those kinds of atmospheres, bringing noise-cancelling earplugs can help. Of course, the only ones that I know of are AirPods Pro, which are crazy expensive (I didn't get my own set, I just borrow them from my dad) but if you can find anything else that's noise-cancelling or that works for you, go for it! Just experiment with different things that make logical sense (or things that don't) and see what works for you.

- A different worldview may be related, but I find it unlikely. It seems you have the predetermined future worldview, which can be difficult for some, including me. If you find that worldview uncomfortable there are things you can do. When I accidentally came to disturbing philosophical conclusions for myself I spent part of my time before bed in self-reflection, coming to a conclusion that I am comfortable with. Different worldviews are comfortable for different people, so try to come to a conclusion that you like and that makes sense to you. The Socratic method can help. ;)

- Find someone you can trust to talk about it. If not your parents, if any of your siblings or friends at school feel similar, or even if they don't, talking to someone else about it can provide a fresh perspective. Obviously your parents would be first choice if they weren't so busy because they are the people that take care of you, but others can also help you learn more about yourself. Sometimes in these situations other people know more about you than you do.

Just my own thoughts, spent half an hour writing this.