I would have to think that it would be because you are having a reaction to the coil coming out. My best friend told me, and several people on hear have said that they get bad cramps when they get it put in, so I could only imagine that it would make you have cramps when it comes out.
Then again, you never know what is going on with your body, so it could be af on her way. Have you ever had the coil taken out before?