Teenage problems🤦🏽‍♀️

Triciontae

Hi guys so I’m 19 and have been trying to get pregnant since I was 17 but it’s not working and I think I’m not fertile I was on the Depo shot Birth control when I was 14 and got off when I was 16 and my period seems very irregular to me it only last 2-3 days but it used to be 7 ....what’s going on with me?