I'm sorry I've never been fired (haven't really had a job I could get fired from yet) but I've recently experienced rejection myself and it sux so bad!! Especially when I feel like I basically only love and am sort of good at one thing in life...

I don't think this is any reason at all for you to give up though. The world needs teachers like you - teachers who actually give a **** about being good at their job. And it's something you will only get better and better at. I mean, remember the movie "Dangerous Minds" (just joking).

Please don't quit your studies! I obviously don't know you personally but my sense of you from this forum is that teaching is your love and you need it. Maybe you could seek out some workshops that focus on classroom management, or ask to sit in on some classes (?) Or maybe you could work at some after school programs or as a tutor? Eventually this will just be a little bump in the road.