Sorry to hear you are suffering, but you are at the right place. We here know exactly what you are going through.
First of all, though it is really hard to accept, it is very important to acknowledge that fibro is a chronic illness and the solution is almost never one medication or one therapy. It will be a lifelong ... well, let's call it a journey.
So speaking from personal experience only, it is very important to accept your new reality. I fought it for many years and that only made me more sick. This will not happen overnight obviously.
Then there is communicating real well with your doctor. This is still a work in progress for me, I now decided to write things in a sort letter and hand it over to the doctor (I suffer from serious social anxiety and have the tendency to run away when things get overwhelming!). Keep an open mind about medications and therapies.
It takes a long time for one medication/therapy to work, so give them some time to know and heal your body. And some meds simply do not work, but don't despair.
It is also very important to keep physically strong. I know it is very very hard, but try to build up stamina/muscle/endurance. This does not mean you need to go run, go to the gym, start bulking up, instead it means doing basic exercises for those parts of your body that are weak. Like in your case, your feet. Buy good shoes, use insoles and avoid standing up long periods of time. Sitting down do massages, and simply feet/leg exercises (youtube has real great video's). It definitely also helps to ask the help of a physical therapist.
Learn to accept your limits, pace yourself, work around the new you and give yourself time off. (this can be hours, days, even weeks). Focus on doing fun stuff, stuff you enjoy. Real joy is often in little things in life - a nice cuppa, a good book, 15 minutes of quiet, being in nature, listening to music etc. These things become more important than ever when we are dealing with pain and fatigue. all the best....