Help I don’t think I’m Fertile

My boyfriend and I have been having unprotected sex for months and I still haven’t gotten pregnant yet. I don’t know what’s wrong with me. Every time he comes inside of me. I have had sex with him before and after my period and in the middle of the month and still nothing. I should be pregnant by now but no something’s wrong.

Update I don’t track my ovulation. Any advice on how to track it? I go based on the app

Maybe it’s not meant to be