Failed math cl/depressed?

today i failed my my pre alg math cl, didnt study for the final havent really done well on the tests. I didnt know I would feel as bad as I am but i feel just like the grade i got, a failure. Everything just seems obsolete like nothing to me matters or keeps me of interest, i feel like a big joke because I wasted my time and money and my career isnt going any where.This is the second time taking it in college i guess im going for a third? I just dont know what to think anymore