Post C-section cramps

I had an emergency c-section 7 weeks ago and I was wondering if any other c-section mummies could shed some light for me. I have now finally stopped with the postpartum bleeding, however, I have constantly got period style abdominal cramps that are making me feel really sick and sore. Is this normal? I keep expecting to find that I have started with my period but these pains have been happening for a lot longer than I would usually have them. I'm a first time mum so everything is really new and strange to me.