Advice from a 64 year old.
Just wait a few days before doing anything.
You're emotional, you're excessively and unnecessarily demeaning yourself, and the world seems to be coming to an end.
But it isn't.
One thing is for sure... making decisions quickly is likely to be a mistake.
Wait, chill, think it out, and when you're in a less emotional state of mind, using the best advice you've got, then the way forward will be clear.
Take it easy. We all screw up. Be thankful you survived your dumbass lesson.
Many aren't so lucky