Sexually active for 5 years now and still not pregnant

Hi guys! Is there something wrong with me? My Bf and i were sexually active.. And lately he came in me everytime we have sex actually,ALWAYS. And for some reason i dunno i'm still not pregnant. It's not that I'm wanting to be pregnant but there are times that i ask my self am i infertile or somethings?Any thoughts guys? By the way i just turn 23 and my bf 24 and we had sex since i was 17.