Quarter life crisis

***Warning... highly self-indulgent pity rant coming your way!***

Five years ago, I had what I deemed to be my "quarter life crisis." (I reasoned that it was OK to have this at twenty, because I was far more likely to live to be 80 than live to be 100.) I was dissatisfied with my life and confused about the direction to take; overall, I felt stagnate and depressed. So, I dropped out of college to look for what I wanted- primarily to work with horses, although I also worked as a supervisor in a sandwich shop, a leasing consultant and a veterinary assistant. Most of the time I worked more than one job, 60 or more hours a week. Overall, I was happy trying to discover what I wanted to do with my life. I proudly supported myself, and finally felt in control over my destiny.
Well, apparently I am going to live to be 100 because I am right in the midst of another quarter life crises! Even though I know that I have learned a lot over the last five years, I am still feeling like they were wasted years, and that I am now half way through my twenties and still messing around. Yes, I am still able to support myself, but I am supporting myself in a crappy apartment. I work extra hours and take on extra jobs in the clinic, adding a lot of hours to my week- which would be worth it if I was able to take nice vacations and buy fun toys instead of still barely making all of my bills. In school, I was always in accelerated courses, and scored high on standardized tests, yet my job is one that anyone can be trained to do. I love my job, and I am very good at it (she said so humbly) but I want more! I always thought that I would do something special with my life, not just be some nameless person who ends up working at Wal-Mart at the age of 85 because I was never able to save enough money to retire with, much less ever start the family that would support me in my old age. The past few weeks I have been heavily brooding over this, and little idea seeds have been growing. Still, I hesitate to take action because, who knows? I kill myself in night school, only to discover at that I am actually going to live to be 120, and at age 30 I will have another quarter life crises, change my mind and have to go through this process all over again. Grumble, grumble, brood, brood, gripe, gripe......