You are abnormal. But you're not the only one. And you shouldn't have to fake it.

Some days just the air on my skin makes me want to rip my skin off. I stim, stereotypically autistic, because constant movement is the only way to keep my skin from feeling like it is in so much pain that it should be ripped off.

And some days its easier than others.

There are things you can do. Yes. I know you aren't diagnosed, but I'd pursue it. Not because you need it, but because I'd pursue the occupational therapy that you can get. It can help. There are things that can be done to help. From this description you should really try the Wilbarger Brushing Protocol. Unfortunately that's one that you do with an OT, with them overseeing the progress, to make sure everything is being done right, so you'd need to have an OT for that. You can find OTs who take adults though.

So that'd be "Find an OT who accepts you as an adult patient, and one of the first things to do is the brushing protocol" is one suggestion.

Next thing I'd suggest is simple. Build yourself somewhere as safe as possible. Don't care about how strange others might think it is. This is for you. You don't need to fake. You don't need to please them. Set it up with things that are good for you sensory-wise or block things that are bad for you sensory-wise. Do what you can.

Similar to that. Noise cancelling headphones or noise isolating earbuds are great for blocking sound while blending into the environment. You're "just listening to music". Even if there is no music on. If you're not wanting to use earplugs or ear muffs, you can use things that would be associated with music instead.

For light, change lighting in your house to what's nicer for you. Don't be afraid to not use CFLs if they're not nice for you. Personally I love LEDs. If warm light or cool light is better. Use the one that is better! Be nice to yourself. For me, if I'm using cool white LEDs people can see a visible difference in my functioning than if its a warm white CFL.

With you mentioning you have a fear of falling, I'd guess you have propioceptive issues. Propioception is basically your body's idea of where it is in space that isn't balance. Usually people who have issues with fear of falling have propioception issues. (I'm abnormal in that I have really bad propioception but not a fear of falling). Something that can help with this and with anxiety is just yoga. It's straightforward, but can help.

Another thing that can help with a huge amount of sensory issues for a lot of people, especially propioception, is weight/deep pressure. So, check if that helps you. Does squishing your body help? Does putting yourself under something heavy help? For a lot of us that helps regulate our other senses and helps get them under control faster and keep them under control more. A really frequent item in a sensory toolkit is a weighted blanket.

On that note, sensory toolkit. You might have built one up already, but not everyone thinks about it. I know I didn't think about it entirely despite having severe sensory problems.

Build up a set of items that help you with every one of your sensory issues and carry them with you. For example, I have a mask I wear for my nose, earmuffs, things of proper textures to fidget with, peppermint oil, gum, and lots more, and these are things I always have with me.

I've probably said too much, but hopefully there's some useful stuff in there.