I have had six miscarriages.... I need help?

I'm 23 going on 24yrs old. I have had six miscarriages already and feellike giving up for hope. It seems as if no doctor out there want to help me. I am married and have been for 3 years now. I dont want to be told that I'm still young and have plenty time. I feel that I dont have plenty of time. I had my first miscarriage in 2003 at 6 weeks. Then I had my second miscarriage in jan 2006 at 18weeks. I had another miscarrige in may 2006 at exactly 2weeks. Then another miscarriage in Dec 2007 at 3weeks. I had another miscarriage in July 2008 at 15 weeks and I just had nother miscarriage just last month at 6weeks 4days. It hurts so bad. I have been put on Lovenox for blood clotting ever since my pregancy in july 2008. I dont know what is wrong with me. I dont know f i have and incompetence cervix or what. Another thing is that it seems like I am fertile but I'm really not. It's really hard for me to conceive. I dont know what to do and i'm starting to lose hope. It hurts so bad. Any advice or good stories out there?