Nothing much to add to what the others have said, except, push for whatever aids you think appropriate. A few small things can add up to make a significant difference to your condition and reduce your sick leave, so your employer will have a vested interest in helping you.
If you do a lot of word processing, think about getting dictation software so that you can dictate to your PC. Dragon Naturally Speaking is the best dictation software, although it needs a powerful PC for best results (voice analysis is a big drain on PC resources). My employer was happy to pay £2,500 for a top of the range laptop on which to run Dragon. The Dragon licence allows you to install it on a home PC as well.
Paul Barrett
Hexham - Northumberland - Loads of spectacular walks - all I need now are the joints to go with them! :)
Enthesitis (2012)
Ulcerative Colitis (1990)