I just need a friend

I'm just losing all hope and need some help... 
When I was 16 I got pregnant with twins. I lost them 15 weeks. I got pregnant not even trying and the first time having sex. Now I'm 21 and my fiancé and I are trying for a baby and we've been trying since May. It's seriously so depressing.. All I can keep thinking is I lost the once chance I had..