why???

why can I not get pregnant???? I've been pregnant 3 times 1st time tried and after 2 months got pregnant 2nd time got pregnant the first month 3rd baby (angel) baby got pregnant without trying. and now I'm desperate for a baby and can't have one 😭 I had a LEEP done after my son and again after my angel baby. I wonder if that has anything to Do with it. 😭😭 I wanna give up but my mind won't let me!!