Could be normal. I had a flex Sig scope on Monday and I am not completely normal yet from it. Also, a colonoscopy can upset and disease you have. (Not sure what your diagnosis is). I know I have gone into mini flares after a colonoscopy because of the stress it puts on the body.
I would say take it easy and don't worry so much about it. If you still have pain in the next day or two, contact your dr and let him know. He might want to do a follow up to make sure everything is ok.
Feel better and let us know how it all goes.