I was really struck by something Jessica over at BookEnds had to say today (in a post about something completely different):
Trying, no matter whether you achieve the results you thought you wanted, is never a mistake.
Sometimes I find myself wondering if I'm making a big mistake, if five years from now I'll have to give up on writing and realize how much time I wasted on something that didn't pan out. But she's right, trying is never a mistake. The mistake would be if I didn't try, and always wondered.