When will it be my turn

I just experienced my second miscarriage in 6 months. I don't show anything on the outside but inside I'm completely heartbroken and wish I could have a baby. The only thing is I may never have another child ( I have an almost 2 year old with my ex husband). My bf has a genetic thing that makes it very difficult for our babies to develop and grow past a few weeks. He doesn't think we will ever have a child and doesn't want to put me through this anymore, but I want a baby so bad.