My question is somewhat similar to everyone else's. I was on birth control for 4 years, and lost my health insurance. My husband and i never used protection and never had a problem with anything. Now that I'm off the nuvaring we always use a comdom. Well this past weekend we were at a Christmas party and got a little to drunk, the next day I took plan b (which was only one pill?) and am now experiencing excruciating cramps. I almost passed out in an aisle at target the other day, and I didn't know why. Now I'm waking up with a pretty large amout of dark blood in my underwear and I just got off my period about a week ago? I'm gunna say yes, this has to do with the plan b. But why exactly are my cramps going crazy??