Yup! I have never had a thermostat. I'm either cold - freezing hands and feet - or totally overheated. I tend to get overheated in the car and have to haul off as much clothing as is decent, then the trouble is I get cold again quite quickly - same in bed, I spend the night throwing the covers back then flipping them over my body again, I'm sure I can even do it in my sleep.
It's like being stuck having hot flushes but at my age there is no chance of that. I was much worse when my thyroid was overactive, I'm supposed to be euthyroid now but I still go from feeling overlooked to feeling cold - I do have spells when I feel normal temperature though which is good.
Years ago I used to have one of those (expensive but I was absolutely desperate) Chillows that you fill with water and somehow or another they keep cool then I would end up during the night looking for a cold patch on that.
At the moment I am using an under blanket thing that seems to have silver threads woven through it and it feels chilled to touch too - well for a little while. I got it from J L but unfortunately they were no longer stocking them.
I also use a can of misting spray, they are really cheap abroad and every supermarket has their own cheap brand, here they cost a bit more you can get Evian and I have a different one I got from Boots, they are quite good, I keep mine by the bed when it is warm and spray my legs and arms and that works well for cooling you down, ok you get wet too but it cools you. When I'm camping I keep it in the fridge which is good too.