It depends what u r eating, a lot of foods can not be processed by those with fibromyalgia.

Have you heard of “Leaky Gut”? Most of us have autoimmune problems, most of them stemming from an unhealthy digestive system caused by a Leaky Gut.
https://draxe.com/leaky-gut-diet-treatment/.
https://www.hopkinsmedicine.org/health/healthy_....
https://www.amymyersmd.com/tag/leaky-gut/.

This has happened to me a lot actually sometimes I just have to lay down for a long time or it will keep me up all night ...that’s why I like to just eat soup maybe toast at night apple sauce is good too maybe a granola bar that’s organic all natural without a lot of sugar ...of course I cheat sometimes but I pay for it ...it’s not worth it

Watch the sugar it will make you worst I gave up coffee too I only eat grapefruit for breakfast it seems to not slow me down , than I might snack on popcorn 🍿 Maybe avocado toast soft boiled egg I like soup for evening meals dairy upsets my stomach so does fat and sugar makes me feel awful

After eating I get pain at the base of my stomach as if the food does not want to go down properly. I drink a lot of water while eating and cut my food into small pieces. I also take meds to help. Nothing works the right way with fibromyalgia. Sending hugs.