Giving up on your goal because of one setback is like slashing your other three tires because you got a flat. So giving up on my goals for succeeding school and graduating will not be stopped by one setback.
"You can't start the next chapter of your life if you keep re-reading the last one." Stop thinking about the "what if". Reflect on "what is" and create the "what's next". Be in charge of your life. Start your next chapter. Be the author of your own story.
There is only one way to avoid criticism: do nothing, say nothing, and be nothing. -Aristotle (i. you can't avoid criticism so you must just learn to accept it and go on with your life. Accept yourself flaws and all).