Mel.. i havent had a c/s but had exactly what you are describing last night. Was just a full on pain all over my belly making me stop what i was doing (was trying to eat dinner at the time).. put me off my food and kinda gave me a little head sweat. DH suggested it may just be my uterus contracting/shrinking. Havent had it since last night though.
I got tested the other week as you know for an infection. Came back negative. Have you had any bright red bleeding? or clotting? Was also suggested to me if i had those then to go to the hospital straight away as it may be an infection. If you havent, then perhaps its just a similar thing im getting.. and hopefully for us both is just our uterus's shrinking.