I learned a long time ago that these kinds of "failures" (that is, setbacks) are not worth ending it all over--and believe me, I've had my moments, past and present.
If possible, review the material and try taking it again. Really. Also, see what else you can apply for, and you don't know for sure you didn't get into teacher's college, right?
April is still several months away. I understand how you feel, but don't give up just yet. There are options.
Take care, and please keep posting, or PM me if you want.
_________________
The existence of the leader who is wise
is barely known to those he leads.
He acts without unnecessary speech,
so that the people say,
'It happened of its own accord.' -Tao Te Ching, Verse 17