Hi Egg.
Sorry you're having pain and depression. I understand what that's about.
My regular family doctor ruled out IBS based on my colonoscopy. He said the issue is "inflammation". He said there is some kind of "inflammatory process" going on in my small intestine. Because he's not a GI specialist, he won't say one way or the other if what I have is Crohn's. But he's confident it's some kind of "inflamatory bowel disease" (IBD).
Irritable Bowel Syndrome (IBS) is a "black box" type of diagnosis when doctors can't find a source of "inflammation", but you have the symptoms. Once the doctors determine you have an inflammation in your upper or lower bowel, then that rules out IBS. If you have an inflammation in your stomach or esophagus, they'll usually diagnose that as an "ulcer", which would also rule out IBS.
You described symptoms that could be an infection, virus, or bowel inflammation. The fever and bladder infection makes me curious. You should request a colonoscopy and what they call here an "upper GI" set of X-rays, and another procedure they call a "small bowel follow-through" which is what they might be giving you the barium for (you drink it and they follow the barium through your stomach and small intestine taking X-rays every 15 minutes).
The bladder infection might be giving you a fever. You named a lot of symptoms, but they'll have to figure out where the fever is coming from or determine if you have an infection. If you said your regular doctor said you might have Crohn's, and he looked at your blood tests, that means he maybe found an "elevated white cell" blood count which means there is some kind of inflammatory process going on, and your immune system is going after it. They usually test for bacterial infections with the blood testing and they rule out certain things like "Celiac's Disease" or C-diff or other kinds of identifiable illnesses. Your regular doctor probably couldn't find any other reason for your symptoms in your blood work so maybe he guessed at IBD (Crohn's or Ulcerative Colitis)?
If a person who has a Crohn's diagnosis has an elevated white blood cell count, and they have the bowel symptoms you describe, it usually means there is a "flare" going on (a flare means an "active inflammation" in the bowel). It's all tied to our immune system.
None of us can really know what your doctor saw that made him think of Crohn's Disease, and it would be wrong for anyone not in your shoes to second guess him. I do know from experience it is better to deal with a specialist rather than a Nurse Practitioner.
Also, because of the swine flu pandemic, and AIDS, and other contagious diseases going around, my bet is that your medical people in UK want to rule out anything which could be contagious. You could have a rare infectious disease that isn't showing up or it could be IBD. Neither is easy to diagnose. Crohn's in the small intestine is especially tedious (time consuming) to diagnose, and involves going through many expensive medical procedures. The symptoms many of us have with small intestine Crohn's flare-ups are almost identical to Malaria. I wouldn't fault the medical system just yet, but it does help to be "pushy" so they can get all the testing done quickly and prescribe some kind of treatment to make you feel better.
The best way to work through this, at least it's been that way for me, is to be your own advocate. Get information about your symptoms and ask your doctors many questions. Don't stop asking questions until you get anwswers that satisfy you. Have someone go with you to your medical tests and visits. Show them that you want to take charge of your life and your health. They won't fault you for that.
Good luck and God bless you.
Joseph