You're not alone. I would put money on there being a LOT of ASD folk, undiagnosed, who found it difficult to survive the pressure and turned to drink.
I'm sure you've excelled a million times during change and stress. In fact I'd be highly surprised if you WEREN'T someone who is excellent at adapting and surviving, given the things you've had to tackle as ASD in a NT world. Personally I'm not scared of change, I just want to avoid the mental load of it. Personally I'm already running, mentally, at 110% processing detail even when there's not much going on, so the idea of change is like adding another million mice to wheels in my head. Like "fuuuuuck, not more detail". That's highly unpleasant. And yeah, sending those mice off to sleep with a lazy drink is going to be appealing.
So yeah, you're probably priming those nerves to be sensitive by drinking the night before, and life happens, people are people, society presses, so I can imagine that the idea of fuzziness and a lack of detail is appealing at 3pm. And once it becomes a feeling of the thumbscrews being released, I can see how it becomes quite important. That's not a solution and it's likely making things worse because the next day you have theose jagged nerves again.
Clearly you need to stop drinking like this, but I really recommend you get some help on your thought patterns that lead you to being so stressed at the same time. Some of it is ASD, I would assume, and will take a bit of conscious thought to put back in its cage, but a lot of it is likely just how you approached life and how you made it this far. That doesn't mean you did anything wrong, but there are probably better way of seeing the world. THe good thing is you CAN learn that. It's takes practice, but you CAN learn other ways of understanding situations, and how you react to them, and that will affect how you feel.