I'm sorry you are going through this. It is pretty miserable, I know. Extra strength Tylenol helps me some but ibuprofen with food helps me much more. When I'm in a flare, I'll take 600 mg. ibuprofen with food. Three hours later I take 1,000 mg. extra strength Tylenol. Three hours after that, I'm back to the ibuprofen. I do this around the clock. You will end up taking the maximum daily allowance of both of these but this has helped keep me on my feet and going. BUT, be sure to talk to your doctor about this first. I did and he knows I do this. He has me taking Prilosec to help protect my stomach from the NSAID. When the flare subsides, then I can start to back off the meds.
Even though you hurt like the dickens, go for a walk outside, if possible. Gentle exercises really do help and they lift your mood, too. You will feel happier and more flexible. If you sit or lay too long, you will be stiff as a board with fibro. Gentle stretching exercises help, too. You can find some good ones in Fibro 101.
Moist heat helps, too. Baths, showers and using a Bed Buddy that gives off moist heat does help, too.
Find something you can focus on, too. It will take your mind off the pain and it will "fade" somewhat in the background. I usually will get on this forum or work on genealogy when I'm in a flare. But, I do get up every 20 minutes or so to walk around the house to keep loose. I also use the stretching exercises.
I hope some of this helps you.
Sherrine