Strange bowel problem, any advice? Doctors, please?

Okay, here's the gross story that so far no doctor has been any help solving. Let me start by saying I've always been very regular and eat plenty of fiber--perhaps too much. I started having a clear discharge from my that eventually caused irritation and itching. After a few days it felt like there was a huge lump or something about to come out--gross right? I thought hemorrhoids initially. A few days later(two weeks after the first symptoms) I couldn't go to the bathroom, which was very strange for me because I go two to three times a day. The next day when I couldn't go I took some saline laxitive that did nothing. On the third day I went to the hospital because it was starting to make me sick. My lack of medical knowledge led me to believe it was still a hemorrhoid that maybe was causing a blockage. An X-Ray was done and they put me on a drip and started pumping me full of laxatives and ordered two enemas. The first enema was administered an hour after I took the magnesium citrate. Two hours after the enema was given there was still no bowel movement, the nurses were freaking out which in turn freaked me out. Almost to the fourth hour finally SUCCESS!!!! The doctor told them to administer the second enema so he could have a clean colonoscopy, the medical proffession being as mickey mouse as it is, the second one was never administered(I'm not arguing) but I did pay for it and it is my health. Anyway the colonoscopy was done and the doctor said there was no hemorrhoid or abstruction, or any other reason for this to have happened. He examined my diet and said that too much fiber could sometimes cause it but that he doubted it. So, it was all strange and I got no answers... just a ten thousand dollar bill. I still have an irritation sometimes, now being 5 months from the initial incident. There is also a lump feeling still most of the time. Is there a doctor out there that actually knows anything about this. My gastrointestinal specialist seemed fairly clueless to all of this.