i too have feeling of being unwell.i find ginger added to hot water helpful.

There are so many organic problems associated with fibro, and IBS and GERD are just for starters, Check in with your normal Dr, and if no help there, I would suggest seeing a Dietitian or better still a local Naturopath who can organise some tests to see if you have food sensitivities or the like. There are just so many reasons for nausea with fibro, and I think most of us have problems with it. I have nausea and giddiness on a daily basis and nothing seems to help me besides taking an occasional Stemetil and daily supplementation with Magnesium complex and Gingko Biloba. These certainly help me, but the nausea and giddiness are always lurking in the background. So I make sure I follow my diet and the supplementation recommended for me so that it doesn't get out of control and rule my life.
Best of luck here.

I have nausea every day from being in pain for so long 😢

My daughters always had nausea since childhood. Later she had fibromyalgia. The FODMAP diet was a lifesaver for her nausea IBS-D

Since April I have had nausea, dizziness and a low grade headache. I finally have an MRI on February 5th.