Hi Knowlin,
I didn't know how to respond to this post but after reading your other posts I think the best thing for you to do would be to call your GI dr and inform him about the blood and mucous in the stool as well as the pain.. The Dr may tell you to head to the Hospital and there he can do the colonoscopy sooner than scheduled?
it is almost 10pm your time now, if your symptoms are that severe or worse, you may want to think about heading to the ER and then they can contact your GI DR and he can make the descision on whether or not to admit you...
Keep us posted.