Did I miss my window?

I have been trying to conceive for almost a year now. I was in a relationship with someone for seven years and he wasn’t really on board for having kids. I was on Mirena for 5+ years so although we were very sexually active, I never got pregnant, no matter how much I hoped my birth control would fail. That relationship ended and I am happily engaged to someone, and the Mirena was removed in March of 2020. I know it’s barely been a year after the removal of birth control but, I’m worried that I missed my window while waiting for my ex to be ready for kids. My fiancé and I are trying, any chance we get, to try and get pregnant but I just get my period every month. I’ve cursed and cried and I feel really alone since everyone is getting pandemic babies and I’m barren. I’m worried that something might be wrong or I missed my window to have kids.