Am I Pregnant?

My Period Has Been Going On For 2 Weeks Now. During That Time, Me && My Boyfriend Had Intercourse Since June 7, 2014. I Got My Period On My Due Date. June 24, 2014. Two Days Before It Came Down, It Was Brownish. Now It's Red., It's July 7th, I Had Spotting Brownish Blood July 3rd  To July 6th. Now It's Back Red Bleeding. I Felt Nausea, Fatigue, && Headach Almost Everyday. Today's My Fertile Day With 27% Chance.