I had unprotected sex on fertile days and Af still came.Had unprotected sex a day before and day after period. I'm cramping a lot back and head hurts and I've been havn a lot of mucus could I be pregnant?

First how did you know it was your fertile days ? You were medically checking or testing ?

Next of course you can be pregnant, you had sex and it was unprotected. Even protected no birth control is 100 percent. The signs mean nothing at this point, the question is, have you missed the period yet. You have to miss your period as the first real sign. After you are 14 days late, you can do a pregnancy test.