hi my name is im 21 years old. for the past week i have been having alot of stomache pain, bloating , cramping, nausea , and headaches . i am married, but have not had any kids. we had an incident with using a condom 2 weeks ago and it ripped. but i have taken pregnancy test and they come out negative. my period isnt dur for another week and a half. what could this be?