Hi Cameron!
Hope things have been improving over the past few days
I have been reading the posts here and wanted to add my voice to princesa - the internet is your friend with colitis. Read, read, and read some more. With regard to understanding UC and the medications you are on - I find wikipedia is a fantastic tool.
The other thing I wanted to say is BEWARE THE PRENISOLONE - it has a massive amount of side effects, and for me, one of those is it makes me CrAzY. In the bad way sadly. I find that when I am on over 20mg of pred a day, my mood becomes less stable, flittering around from happy to sad, extatic to depressed all in the space of one day. Little things that normally don't bother me get me insanely annoyed.
It took me a while to realise the above.
For more info on pred, check out http://arthritis.about
.com/cs/steroids/a/corticosteroids_2.htm
Don't freak out or anything, but I found I felt way more in control once I got a solid understanding of UC and the meds I was on.
All the best and quick remission!