I got my period a day early nov 4 which was on and off during the day and it was very light and brownish and lasted for 4 days . I had unprotected sex nov 12 and nov 25 i am having really bad abdomen pains and cramping . Back pains and lightheaded . Not to mention i have taken 4 pregnacy test all negative and also one a planned parenthood !! NEGATIVE What do i dooo . I am so worried and concerned . Please helppp !!