Stopped TTC because fear of mc

Well I had my first MC in December of 2014. My second one was April of thid year. Since then I stopped trying to get pregnant. My fiance wants to try again but im too terrified of another miscarriage.

My first was devastating but I accepted it more because many people have a miscarriage the first time. The second one is making me think something is wrong with me...

the doctors cant tell me anything because I was 9 weeks with my first but my baby looked like 5 weeks and my second one I was only 4 weeks so they cant tell me much of anything on whats wrong....

Im just so depressed about it and I am too scared to try again.