What am i doing wrong?

Why is it so hard for me to get pregnant.

I have been active and exercising. My periods are pretty regular, only varying by a few days.

Was it the birth control I took when I was younger? Do I have a hormone imbalance? Do I have PCOS?????? My gyno didn’t say anything was out of the ordinary for me at my last visit. What is wrong with me. :’(

Edit; I am 24 and I have been trying for 3 months

Edit 2; I know some think 3 months isn’t long but when all of my family members and friends get it on their first or second try, it makes things worse.