Back to OT

Here we go again! I'm thinking of going back to school for Occupational Therapy...yet again. I'd rather take the fast track and be a nurse, but I don't do well with blood and needles, so that's probably not a good idea! This time I'm skipping Ivy Tech for prereqs since that is what screwed me up before when I was going to start the OT program. I'm so mad at myself! I could have started the OT program this year, but instead, I now have to wait until 2010. That seems so far away! I'll be 30 when I finish if I get in in 2010. Sigh. That seems so late to be starting over, although I know others have started over in new careers older than that. I just hate thinking that I've wasted my time so far. I know I haven't, but still...in some ways I feel I have. I guess I just wish I would have picked the right career the first time.
How can people expect an 18-year-old to choose a career anyway?