My last period was August,15 2009. It ended after the 19th, and on the 20th my boyfriend and I had sex. The condom broke so he came inside of me. The next day I took the plan B contraceptive. On the 26th of August I got my period again. My period was never regulated, and I took 2 pregnancy tests. Both turned up negative, but I still haven't gotten my period. I am very concerned because I still haven't gotten it. Do you think i am pregnant?