Beyond ready need advice

Hey so I found out on Wednesday that I lost my baby. This is the 4th miscarriage and I go back to the doctor on Thursday 16th and I think there's something wrong like my hormones being to low or something. I need help is there any kinda medicine that works the best to help? I've had test done and everything is fine and I just don't understand. I can't get over 6 weeks. And me and my fiancé are beyond ready to start our family together. Any advice would be great thank you.