How do you know if you're recovering from depression and when you're recovered?

I've been battling pretty severe depression and anxiety (plus OCD, eating disorders-but that's a different story...) since I was at least 14, and I am 20 know. I had my first appointment with a psychiatrist 3 weeks ago and started Zoloft 16 days ago. It seemed to start working a week into it, and my anxiety decreased a lot, but not completely. Also, my depression decreased so that I don't feel that huge spiraling black hole and despair anymore, and was slightly euphoric a couple of times but just because I was happy things were improving. I didn't do well on the exam this week, so I felt a little worse, but not that deep depression. I forgot how it feels to be normal (I was never normal-I was very anxious even as a little 4 year old girl, although smiling and happy till puberty), but how does it feel to be normal as in totaly free from depression? I still have trouble making myself care about my personal hygiene (I know it's yuck...) and get myself do my college work-I'm mostly online. Although I don't feel that anxiety to get myself to studying anymore, but I am a perfectionist so I procrastinate. Your thoughts and experiences on this? How do you know you're getting up from your depression and that you're completely recovered? Thanx! ;))