I completely understand how you feel, but you can't quit. You've come a long, long way to just give it up like that. I'm sure that if you focus on your desired outcome, and get your thoughts together, you will succeed. I too am having some difficulties with my studies right now, especially after my coursework was deleted. A few week's work was completely deleted in one click. I will try to recover it, especially since I have learned about several ways to recover papers, but it doesn't guarantee success. But that's okay, I'm already mentally prepared to have to write my paper again.