I've said this so many times on here but, if this helps, this is my experience of going GF: I went gluten free from desperation. I have had fatigue problems, bowel regulation/movement issues, joint pain, bladder urgency issues and a foggy head for years.
I think I have had some form of fibromyalgia or CFS since my early teens but I saw 5 different doctors who said it was in my head or I was anaemic due to being veggie (never had iron levels checked) and my symptoms were all unrelated
I never realised it could be related myself until I worked for somebody with fibro when I was 20, even then I never did tell the doctors what I thought I had as I knew they would send me straight back out for consulting Dr Google, not that it mattered anyway.
A friend suggested trying a gluten free diet. I didn't expect anything from it but desperation won out. Within weeks/months various symptoms alleviated. The bladder urgency issues were the first thing to lessen, I went from being unable to use public transport or go somewhere new and having panic attacks about not having access to a toilet, to being able to sit in a car for 2 hours without needing to stop when we usually would have stopped at least four times by that point.
The fogginess went almost entirely, bowels regulated and the fatigue became much much more manageable. The joint pain hasn't stopped, it's spread to my other joints but it's more manageable, less painful than I think it was 10 years ago despite being in quite a few of my joints.
I can and do rarely eat small amounts of gluten, now it messes mostly with the fogginess and bladder but occasionally I get the other issues. I don't have much if I do eat it. A small slice of baguette, a piece of baklava, things like that, it fills me up really quickly. I only ever really have it if I know I'll be in a "safe" place in the next few days, so at home or work and not much driving/travel in between. I had a bowl of pasta back in April and really regretted that the next day though.
I saw a doctor last year who did take me seriously and she thought that maybe I had undiagnosed gluten intolerance, but to test would mean eating gluten daily for 4-6 weeks and there is no way in hell I am doing that again. The fogginess is what makes me really ill and I can't face that again. The bladder urgency is not fun either, it ruled my life for 3 years and was an issue before that too.
My family think I am doing it to be difficult. There's nothing more fun than restricting your diet further (already a vegetarian!) 