I'm extremely sensitive to the temp changes. I get bouts of chills from out of nowhere all year round. If I get chills they can last for a few minutes or hours. Even staying covered up won't make them go away until they're ready to. Then I get too hot. If I get hot from the summer heat, it can lasts for hours. If I get cold from the A/C, it can take a long time to warm up. I've had this problem for so many years that I just deal with it, but it's very frustrating.I do have hyperthyroidism which I take medicine for,but that seems to go along with fibro. So that's part of the mystery of fibro too. Hope I helped you out. Take care. Sending you 2 hugs. One warm and one cool.

Put a comforter in the dryer for a bit, take comforter out , take comforter to couch and wrap up in comforter. Ahhhhhh feeling….

Do you have a fever with the chills? Didn't you just get out of the hospital, or am I confusing you with somebody else? If you did let your doctor know about your symptoms.

You are not alone. I have to keep a heater close by and a good sweater. I used to be very it with hot flashes til I made it through Menapause. Now I have bouts of being terribly cold even in 80 degrees .

I believe our body thermostat is the hypothalamus and it malfunctions in many of us with Fibromyalgia. This is also common in M.E./C.F.S..
I could get a bone deep chill just from the tiny bit of air movement that occurs when we walk slowly through our dwelling place. Also, if outside on a warm day, but not even hot I can become almost interior panicky sensation as though the warmth will suffocate me, a very desperate feeling. Our body cannot always properly regulate our body temp. and in some cases it really does literally swing back and forth, though most physicians would doubt you and ignorantly perhaps laugh at the idea, but when we have measured episodes ourself, then we know the facts. It is an autonomic neuro function.
Contrary to popular opinion, a person doesn't have to be out of it in a neuro intensive care unit to have hemodynamic instabilities either.
Those who haven't lived it in their own skin, with time to reflect, just don't know what they don't know.
You might like to watch the free short documentary below and if you're like me, repeat to yourself, 'absolutely '.
https://awakenedthemovie.com/thank-you?fbclid=I...