Miscarriage

I had a miscarriage back in February of 2015 I was two days away from coming out of my first trimester, but we have been trying ever since and no it's in my head that I will never be able to carry a baby ! And it bothers me a lot because some females don't want or don't even take care of they're babies (kids) I'm around it every day . And it's so upsetting because I k ew deep down inside that if I were to have had my little one I would have been the best mommy in th world. When I see the females doing they're kids so wrong and don't care I wanna just take them home with me and take them as mine. I feel like I can never have a baby again and I can never carry! My last obgyn told me that it was most likely because of my blood I'm O - . I just don't know what to do but cry or get in my emotions and feelings about the situation