If you still have hold of your job despite having being diagnosed with such a horrible condition then I am genuinely very admiring of you, because it is not an easy thing to do. It helps, I feel, if you have a good working relationship with your boss/manager, who understands about your condition, and can perhaps grant a small amount of time off here and there if you need it. If your manager is not on your side then it makes things a lot harder. It is also good to let people who you are working with know exactly what it is that you're dealing with, because doing so means that you're likely to get a lot more help than you otherwise would have done, which of course is no bad thing at all.