Last Month I took Plan B. It made my period come a week late. After my period I've experience cramps everyday. For the first few days I thought the cramps were because I was getting rid of old blood. Because I would have brownish discharge in my underwear. And then I would continue to have cramps afterward. I think I'm ovulating now so I think that explains the cramps I'm having now. But why and I'm having this cramps and is it something more serious. It's mild annoying cramps.