My God! I'm surprised you are not inundated with answers to this question. I have to say I'm not experiencing anything like you. Every now and again I get a clammy feeling, but it's the lack of sleep that truly drives me crazy.
I'm usually an eight hour a night sleeper and bounce out of bed to ride 40 - 50 km, six days a week. Now it's, I've only slept 3-4 hours or I've slept longer but it has been an interrupted sleep, waking every couple of hours. I'm just wondering why there aren't more women of menopausal age in prison for justifiable homicide etc. This has affected my exercise regime and I'm wondering if this is a vicious circle, where you need the exercise to sleep and need the sleep to exercise. I still try to get 30 minutes to an hour of cycling or walking into each day to help with the 'tiredness' factor.
I don't do HRT, but am relying on the gene pool and a nightly cup of camimille tea. (I think gene pool more of an impact.) Neither my Mother or two older sisters had any major symptoms and (knock on wood) this seems to be the same for me. I do however sleep with my feet out from under the bed clothes. They are my regulators! If I do start to feel clammy and my feet are under the bed clothes I move them to the cooler air and it seems to stop the clammy feeling. Problem here though is it has woken me, and the sleep patterns are interrupted.
Here's hoping we both get through this time with our sanity intact. Sleep well and get a rubber mattress protector!