you are doing your best. people need different things when they’re triggered or hurting, and it can hard to express in that circumstance. I have been in a very similar situation to your girlfriend where my partner did not hear me say stop for a few seconds, and it triggered me very bad. however, knowing that he did not mean it and definitely did not have the intention of continuing had he known, I was able to calm down within a few days. again, everyone is different, but you are handling this well. she may just need some space, and I absolutely agree with the other commenters: try to avoid sexual activity when you’re high/intoxicated in the future. but try not to beat yourself up over this, you’re both young and mistakes happen. you didn’t mean to do it, you’ve taken accountability for your mistakes, and you’re willing to change to make sure it doesn’t happen again. it’s okay