Period help...

According to eve my period is 6 days late. My period is irregular & normally I don't start the day that eve tells me my period is going to. I've had protected sex with my boyfriend probably about 7 times this month, and he pulls out each time before he finishes too. Yesterday I had unprotected sex for like two minutes but he pulled out long before he finished, but during it and after it had a sharp pain in my lower abdomen. Any advice or opinions to help? 😩