It isn't easy to pass on that information, as we are all different. And as you're probably very worried about it, we can only - from previous experience - suggest things. If a gastroenterologist or a colon and rectal surgeon suspects that you may have either of these, or some other immunoreppressent disease, I expect that a colonoscopy will be suggested to you.
I know it's a worry, as I have a disease that suppresses my immune system myself, with all types of different side effects, but the doctor should be able to at least put your mind at rest. Have a look through the Crohn's section of the forum too. We are not that many people on here; people tend to heal and move on, in general, which is why I'm suggesting what I can to help
I hope something I have said (my thoughts on your situation) are of some help to you while you to to see your specialist. You can also rant about it on here to your heart's content and we'll at least react as someone on here has been/is in your situation.
