How concerned should I be? My husband and I had a mishap with a condom last night and I took a plan b about 12 hours later. I have felt fine all day except for some anger, I'm on Prednisone and other meds due to a MS diagnosis, and anxiety. I have a history of ovarian cysts but also diverticulitis. But now I am having sharp stabbing pains in my lower left abdomen. It is coming and going, but when it comes it is a very intense pain that stops me in my tracks. I can't be on birth control, mirena, or anything like that because they cause things like ovarian cysts and extremes crampy in random times that cause me to end up in the fetal position.