Hey there,
I've read through all the comments with great interest for myself, as I've just come off 7 months on crutches and need to feel better and move more!
Two things that have really helped with my IBS...
I went to a Kinaesiologist, rather than a Nutritionist (been before didn't tell me anything I didn't already know at the time). Now, I'm not really one for 'woo-woo' stuff 😆, and I definitely cannot explain how it works, BUT... she identified about 6-7 things for me to avoid, including gluten, and my bloating, awful stomachs, many many trips to the loo have been dramatically reduced. And some of the things I would never have thought of as triggers for me (mushroom, apples, oranges...onions, garlic 😢), but I have adjusted and found work arounds that don't trigger me. I was highly sceptical, and told her, interestingly she had a science degree as well. It's very non-invasive and seems to have proved itself to me quite dramatically.
She suggested I would benefit from Zinc, Magnesium and Probiotics and it's hard to quantify, but I'd say they have helped.
Following on from that, I also keep an eye on eating fairly low FODMAP, and I came across a lady who makes jarred sauces which are low FODMAP, I almost always cook from scratch but it has been nice to be able to grab something in a hurry and know it won't make me ill. That's Bay's Kitchen and I bought a food diary from there to help me to do low fodmap properly, and then have a go at reintroducing some foods in a controlled way.
If you are, or find you need to go gluten-free, I can highly recommend Becky Excell and her FB group and Insta page - how to make and bake anything gluten-free just gives you new hope that you don't have to miss out and feel deprived.
As a PP had said might be worth double checking you're not coeliac, as that can give a lot of the same symptoms as CFS - if you search on Becky's FB group there are lots of posts about people getting tested and pros and cons of blood tests versus the kind where they take a biopsy (I think it is) from the colon to look at auto-immune damage from gluten.
And again as PP have said, worth checking your hormones for menopause, although 9 yrs ago would have been early, it would not be unheard of, and would be easily missed. So few GPs seemed well informed about menopause sadly.
Presume your thyroid has already been tested.
Good luck with it all.
Little changes, little habits will really help. X