Life is like this:
when you drop your phone, you don't go, "well crap, I dropped it, better get rid of it," and then smash it with a hammer and toss it out. You pick it back up!
Same goes for life. Same goes for dieting. Same goes for auditioning. Same goes for working out. Same goes for schooling.
When your car starts to veer into a ditch because you weren't paying attention you immediately correct, you don't just go into the ditch.
Life is a series of mistakes and slip-ups - you've gotta keep going.