I took Plan B and it made me feel bad for the whole next day. I had the cramps, a pretty good amount of nausea and an unexplainable feeling of just like s***. I slept through the next day, it helped me not be so aware of the side effects. I'm kind of late in replying to your post but I think that if the cramps are still there by now you should be seen by a nurse/physician. Hope you are feeling better!