Fibromyalgia flares are something most Fibromyalgia sufferers go through and is a dreaded part of Fibro. They can make your life very miserable.
One thing I found helped me with a flare-up was by writing it in my diary when it happened and what I did to help with it and if it helped.
I also have a list of all the things I enjoy that take me away from my pain like one of my hobbies (making cards) and baking but maybe for you it’s Tai Chi or Yoga that helps. Just knowing something that works will help get through the flare-up.
Make a note in your diary of a particular treatment that helped or a medication or piece of equipment like a tens machine that helped.
Knowing that there is something you can do, use or otherwise for your flare-up, will get you through the worst days and back to controlling it as you normally do.