Pregnancy

Okay. So me and my fiancé have sex all the time. And I mean ALL THE TIME. and I was on the Depo shot.  (Birth control) and so I got off it some time in January. And me and my fiancé always have unprotected sex. I'm allergic to condoms anyways. But ever since I got off the Depo shot I STILL CANT get pregnant.. I really want kids. I'm 18 so o believe I'm old enough. Any help ??? 😭😭