I've had a very similar experience. Even though I was depressed many times in high school, I always retained my desire to achieve. Even though I stayed home from school over 20 days each year, I still managed to graduate second in my class. My main goal was scholarships. My first two years weren't that bad. I suffered from procrastination, but I'd had that problem to a certain extent since middle school. I changed my major the last two years a couple of times. I was concerned with getting into the full-time workforce as soon as possible, so I gave up my original desire to be a clinical psychologist since it requires a PhD. I graduated in 1996 and have still to find a job I really enjoy. I've been to grad school twice and failed to complete the program both times. I have no passion for the subject (history). I don't know why I ever thought I did. I have no strength let for the struggle. I think I would have been more successful if I had sought treatment for depression much earlier. I advise you to be evaluated. It can't hurt anything. If your university is like mine was, the have a free counseling center and agreements with local psychiatrists for discounted treatment if your case warrents it. I wish you the best.