Me and my boyfriend wee having sex, and the condom broke and he came inside me. Only after he was done did we realize the condom broke. We went straight to the store and bought PlanB and I took it probably about 45 minuets later. I am not on birth control and I took the pill as soon as possible. I'm already experiencing sharp cramps. I am supposed to start my period this coming Friday, will it be delayed? if it doesn't come at all will that mean i'm pregnant? How will I know if it is working?