Hi @Sevillelights
I have colitis and although this may be not be the cause of your problems it might be worth trying some of the foods I try when it flares up. A flare up can stop your body absorbing the nutrition you need from your food - this leads to extreme fatigue in me if I don't watch it.
Like you - I can eat/drink whatever I like in between but I still automatically cut down on foods that stoke inflammation.
I find that avoiding the following can ease a flare up:
avoiding - high fibre (no wholefoods), raw veg, nuts, seeds, artificial sweeteners, monosodium glutemate, remove skin from fruit and veg (the fibre is hard to digest during a flare up), processed foods.
eat plenty of - banana, avocado, live yoghurt, eggs, chicken, fish, rice, bone broths, butternut squash soups etc. Easy to digest - nutrient dense foods basically.
I also supplement with floradix , spatone and and vit D tablets which seems to keep my energy levels tip top.
I notice if I don't do these things!
I hope that helps - I know how debilitating regular digestive issues are.
PS. not eating during a flare up is something I do too - just remember the bone broth and fluids for nutrition