Depression question, I have no where else to turn?

I suffered from depression in my early pre-teen to teen years. (11-13 years old) And I was taking 50mg of Zoloft everyday for it. It helped for awhile but then I suddenly crashed. So I gradually came off the medication. Now, I am 19 years old. And for the past two months I've been getting more and more depressed. I've even developed insomnia. But these past two weeks have become almost unbearable. I get REALLY depressed, then I get angry because I can't stop being sad. Then I start sobbing uncontrollably, then it causes me to have a panic attack. I USED to cut myself when I suffered from depression before, but I don't want to do that again. I don't really feel the need to. And I'm not suicidal either. I just don't know what's wrong with me, or how to even go about fixing it. The only time I'm not feeling down is when I'm with my boyfriend. I don't want to depend on him. Or when I'm at work, but that's only because I'm SO busy when I'm there, and I don't have time for feelings. I'm not on any type of medication. My life is actually going pretty well, I have tried multiple drugs and I have drank, but I have been clean for quite some time now and I never suffered any withdrawals due to getting clean. What I'm asking is, does anyone know what's wrong with me? Or how to go about fixing it? Doctors visits will have to wait because I am currently uninsured. I don't normally ask questions like this but no one so far has been able to give me an answer. Help?