Nervous

Hi ladies! I just wanted to get other females opinion. When I was 18 I had a pregnancy terminated for multiple reasons (please don't judge it was a hard decision for me)now at 21 Im in a great relationship and Im no longer on birth control. My boyfriend and I don't use any protect and I've never gotten pregnant. (Not that Im trying to) Now Im worried that I possibly cant get pregnant and I don't know what to do