Colonoscopy

My question/concern is, for a few weeks I have loose stools. Not terrible diarrhea or anything...just not formed solid stools.  I felt fine otherwise, other than an occasional nausea.  Then litterally over night it turned to watery diarrhea! Then watery and green, then watery and clear with mucus like stuff in it, all in a couple of days! 

I know all this is gross and not pleasant to talk about but I am concerned.  I have had stool cultures to rule out any bacteria infection or parasite.  I have had blood work and that all has come back fine.  Which I guess is good and bad because I still do not know what is going on! I finally saw a Gastroenterologist and he doesnt seem to be overly concerned, however he scheduled an endoscopy and colonoscopy for a week from now! 

I am praying this is nothing serious like cancer (since there is no blood in my stools and blood work is fine) but Im scared.  I have been reading as much as I can on-line about different causes for on going diarrhea and IBS seems to fit the proile closer than anyother.  Bloating, diarrhea, etc.  Im not sure how serious IBS but it from the sounds of some of the others, I hope if anything its that!  

Can anyone give me advice and also comment on the procedures I have to go through?  I have to use Moviprep and I think I am almost more worried about the prep than I am the procedure.  Should I take the entire amount given to me?  I mean I feel about empty as it is....I think if I take all of the prep I will be feeling awful!!

Sorry for such a long post...thanks in advance to anyone who comments!

Thank you for your answer.  Where you suggesting by listing what you have that I possibly have IBD?  Did you have this mucous in a BM before? Do you think it was a result of my Colonoscopy (or Endoscopy which I had on the same day)?

I just underwent my first colonoscopy a few weeks ago. I had been dreading it for approximately 6 months. Luckily enough, I had a very understanding female doctor who made the experience painless on her end. The actual colonoscopy was a non-event. Honest. The prep is another story. Once you have the prep done, your work and pain are over (at least from my experience). I thought it would be the opposite. I thought the prep would be the easy part. The Dulcolax tablets I took at bedtime 2 nights prior to the afternoon procedure were awful. I was up by 6am the next morning with cramping and diarrhea for a couple of hours, approximately 10 times within the hour. I felt terrible. I kept up with the liquids, chugging back huge amounts of Powerade, gingerale, apple juice and broth. By lunchtime, I felt okay enough to do a bit of light weeding in the garden. It was good to get outside and get fresh air yet be close enough to the house in case I needed to run to the bathroom. My bum was definitely sore from all of the bathroom usage and I found wiping with a wet wipe helped the situation. By the late afternoon, I had some Jell-O and that helped with the hunger pangs and made me feel I was eating more "solid food". By 4pm or 5pm, I was required to drink the Pico-Salax preparation and many glasses of water/liquids. This kicked in about an hour later and once again, I was running to the bathroom every 10 minutes for a few hours. That settled down by about 7pm or 8pm. I had what looked like pee coming from my bum and I knew the prep had already worked really well. Again, I made sure I kept up with comsuming the fluids. I was actually able to go a few hours without needing the bathroom that evening. Wake-up time the day of the procedure was another dose of the Pico-Salax followed by several hours of running to the bathroom. I kept drinking water and went to the hospital for 11:45 the morning of the procedure. They actually got me in early and I was very hesitant (nobody had even examined my bum before, ever, so this was definitely uncomfortable and dare I say, humiliating for me). The doctor and nurses were great. I had the sedative and narcotic pumped through my IV and was pretty much out of it immediately. I do remember moaning from a bit of pain once but that's it. I remember nothing else. The procedure was over very quickly and I felt more or less fine afterward. I woke up quite quickly, was forced to rest a little while because I was groggy and then was allowed to leave. I got a bit of take-out to eat on the way home. I even helped my friend clean and wash her car afterward. I did pass out later in the afternoon for a good 2 or more hours of sleep and even went for a walk that night after I woke up. By the next day (or perhaps another day later) my bowel movements were back. I was back to normal activities the next morning. I have felt fine since and really wanted people to know that this procedure doesn't have to be bad. You find out important information from it and once through the prep, the procedure itself isn't at all bad. I actually want to go back to the hospital to thank the staff for making the experience so tolerable. My tests came back fine so I'm lucky. Good luck to anyone having the test done! My thoughts and prayers are with you.