I've been having sex with my partner for about 3 years , and we do have unprotected sex . My period was regular to begin with. The first time he came inside . I thought I was pregnant but nothing , I got my period . So we kept be unprotected . Then I turn 18 and my period started to be all crazy . And un normal . But we kept being unprotected . And still no signs of pregnancy . I'm going to be 19 years old . And I'm getting scared of why it's happening . Can someone relate ?