Desperately need help

Hello ladies, I need help. I'm 27, divorced and with a new man. He is the absolute love of my life, and I am afraid I am sabotaging my relationship. I have PCOS, and have struggled with miscarriages for some time now. Our relationship is great, but I'm afraid. I want nothing more then to get married and start a family, if I am able to have a child. He does not want to get married or start a family until he gets his custody issues with his son settled. I completely agree and respect his choice. His son is young, and he doesn't want his son to grow up thinking his dad replaced him with a new family. He wants things to be solid with his son first. I'm just so terrified that by the time that happens that I might have missed my chance. I need help dealing with this issue. I can rush him into something, and I'm worried that my insecurities could push him away. I am currently in a support group, but I feel like that isn't enough.