Heat and humidity actually make me feel like my muscles melt. Causes extreme weakness, and exhaustion. I am a barometer. I can't tolerate cold either. Fibro fog is a terrible thing. Sometimes I am better other days I can't think or spell my own name. Spent too many, many years being told nothing was wrong with me. I got worse and worse, eventaully collapsed and this time didn't improve enough to return to work. Cymbalta did nothing for me. Lyrica didn't either until a different doctor jacked my dose way up, now it's a wonder drug for me. Each person is different but fibromyalgia is real. Good doctors know this, quacks still denie it exists. If your doc insists fibro isn't a real illness, CHANGE doctors! Just be sure you get diagnosed by a specialist in fibromyalgia.