Hi everyone, i'm going to try to give as much information as possible in order to get the most reasonable anwsers. My girlfriend takes yasmin birthcontrol and has been doing so for roughly 11 months with no problems. This monday we had sex in the early morning, tuesday her peroid started which is extremely regular, same date every month since taking bc. Tuesday afternoon she got an extremly sharp pain in her lower left side near her ovary. This is the first time this has happened, the gyn doubts it's an ovaultion since she's on bc as well as her peroid. The pain has been constant for about 24 hours now dulling from time to time but never really dieing off. Could she be ovualting on her peroid while on bc or it more likely something else? Any help would be nice, or if more information is needed please ask.