When did you first find out you had fertility issues?

I know that my mom had issues conceiving. She had uterine fibroids. That’s all I’m aware of. I recently had sex with behavior that I believe should’ve left me pregnant, but didn’t, that I know of (my period is due tomorrow). I’m 20. After my visits to the gynecologist, everything seemed to be normal!

When and how did you find out that you had fertility issues? Experiences welcome, judgement and lectures are not!