Fertile? Ovulationg?

If my bf and I have sex everyday and he cums in me everyday and I still end up having a period am I fertile or should I be checked? I am having periods but I don't know if that means I'm fertile or not. And is it a for sure thing I will ovulate after my period on the 12th to 14th day? Or can I ovulate on my period? Or what about right before or right after my period? Is ovulating right before my period even possible? I'm so confused!! Please help!