I did not have my period for 18 weeks straight so about 4.5 months. I thought my oral contraceptive may have had something to do with it so I went off the pill about a month or two ago. I finally got my period in January and then again 2 days late in February but this whole time I have not been on birth control. I've had regular unprotected sex with my boyfriend many times over the past 2 months that I haven't been using any form of birth control. I've taken a few pregnancy tests and they've all been negative. Who thinks I may be infertile? Or could it be because I've been on birth control for 4 years and can't get pregnant right away now? I've also had 1 abortion 4 years ago.