A positive story...
I was diagnosed with ulcerative colitis in September 2010. I was very unwell with it. Months on end of 20+ bathroom trips a day, blood loss, lacking energy etc.
It all seemed quite bleak with lots of hospital visits, tests, trying different medications but eventually (though I have to admit it took over a year) my consultant hit on the right combination of meds for me and things gradually came under control.
Now, I feel healthier than ever before. My colitis seems to be firmly under control for the moment and I am making the most of it. I had a tough time with it for the first couple of years after diagnosis but the overall impact on me now is that every day that I'm well, I recognise that and I feel grateful for it. It's only a fleeting 2 second thought, but I think it has made me a happier person because I appreciate that I can get on and enjoy my day.
Of course, I know the nature of IBD is that it'll most likely flare up again but I'll be better armed to deal with it. I'm getting more exercise now that ever before which I'm hoping might help and I have confidence in my consultant to find the best treatment for me. I've done lots of research on surgery options so that if it ever comes to that I'll be as mentally prepared as possible. But for the moment I'm just making the absolute most of being well. 
There's a lot of scary info on the Internet because people rarely write articles/forum posts when things are going well, so hopefully my positive post can balance that out a little.
Fingers crossed it's a smooth journey to finding your perfect meds cocktail, and one thing I can reassure you on is that although they're obviously not much fun, colonoscopies are perfectly manageable and absolutely worth it for a diagnosis.
Hmm I started writing this an hour ago and then got sidetracked. Hope my post is still relevant to the path the thread has travelled down since I read it!