Is mucus in your stool normal

I have been having a lot of stomach problems. I was told that i have IBS but now im starting to wonder if its more then that. I have always noticed mucus in my stool i asked the doctor and he told me that it was perfectly normal and a lot of people dont even pay attention to it. Well now the mucus is increasing to the point that im passing just mucus sometimes, also wen i wipe its just all clear mucus. I also experience intense pain and diarrhea.For the last 2 week ive been getting a pain on the left side under the rib cage. I was just wondering if this was normal or if it could be something else.

[TiredSick]

Ive been getting  mucus in stool along with black specs in my stool; also have a  productive cough; i had a few blood test; went to see a G.I. doc; try to make your doctor write you a prescription to a G.i. doc. hope you feel better.