The heat and humidity makes mine worse, everytime. I have really had a flare up during this extreme hot weather. Although, cold weather does that, too. Not a good happy medium, I guess. Any pressure changes, FM raises it's ugly head.
Hope you get it under better control soon. Sure saps energy. I used to be the best housekeeper around, but with this FMS, I can't do what I used to do, although I keep trying.