I've been on the fentany patch for two weeks for severe pain and now and my period has not shown up. I was fooling around with my guy (we're not together now) and he slipped it in for half a second and pulled out and wasn't anywhere near cuming as far as I know (I got him off about seven minutes later) . I was on morphine sulfate 60 mg this month as well... I'm stressin' real bad here... is pregnancy a possibility? :'(