Baby fever

I miscarried in June and been trying to conceive since then the doctor said I should get pregant soon since you are even more fertile after a mc I was so sad after the loss but now I am suffering from baby fever I want it so bad but I can't seem to get my bf to want to have sex a lot he only wants it once in a while I feel crazy I already have a baby girl who I love more than anything just want another one to love and cuddle I don't know :/ maybe I should stop worrying and just let it happen when it's time