Heya Honey.
Did you have a general?...After my second D&C (under general) I got a really big headache and my shoulders felt really stiff and sore as if I had slept funny. I thought it might have been the type of general they used, but this didn't happen the other two times and the same type of general was used all three times so they just put it down to the way I was lying while I was under (the position of my head).
I don't know if it was the same thing for you but it does sound similar.
Take care Sweets!