I'm 18 years old and I'm on birth control called Camrese. The pill is to not let me have a period for 3 months. I've been on the pill for about 6 months. Out of nowhere I get the stabbing constant pain to where I've hunckered over cause it hurt so bad. I've got a period even though I shouldn't have one. I feel nauseous sometimes. I'm going to the OBGYN Thursday for an ultrasound.