For The Past Couple Weeks I've Been Getting So Much Pain In My Stomach, I Fell On My Period Last Week The 5th-9th It Only Lasted 5 Days Which Isn't Normal Because It Always Lasts 1  Week. I Still Feel Bad Pain In My Stomach And Keep Feeling Nauseous But I'm Not Throwing Up. Any Help On What It Can Possibly Be ? I'm Not On Any Type Of Birth Control &' I've Been Having Unprotected Sex