My period came last month on june 5th it lasted four days,june 21 came i was sexually active and the condom popped,june 30th my period came on again now this month july i haven't seen my period yet went to the doctor on the 15th they say i wasn't pregnant but then yesterday morning, July 20th i saw a little bit of blood and some white mucus, all of sudden i feel sick and all what is going on?