Pregnant?

I might be 2 weeks pregnant, I had unprotected sex and he cummed in me but I'm on the pill. I have been so hungry the past 2 days I just keep eating, I've never been like this and it's really shooken me bc I usually eat just right but I just can't stop! Could this be a sign or am I just over reacting? Also had a lot of discharge than usual the past two days aswell