I like your quotes. Thanks for sharing them.

You have absolutely no responsibility for changing the past. It can't be done. All you are responsible for is to answer the question: "Where do I go from here?" When you lie down at night, say to yourself: "Today is over. I cannot relive it. My only job now is to go to sleep. Tommorrow I start anew."

Don't ruin the present and the future by wishing the past was different from how it was. People recover from all sort of horrible failure, even way worse than any you may have had. Keep that in mind. You have different options now for what you can do next. You're not yet in circumstances that you are locked into. Be glad of that. Good luck with going back to school.