I Am 79 Very Past Menopause And Am Very Hot

I am 79 very past menopause and am very hot -worse at night a - and waking with sweats. Sleep with no heat and a summer nightgown and only a sheet. Other symptoms: when I wake I feel like I am shaking inside. When I feel my body, I don't feel any outward shaking. (History of polymyalgia and giant cell arteritis - on 4 mgs. of prednisone.) Last year my synthroid was reduced. I went from hypo to hyper thyroid. (From .88 to .50) My rings are loose on my fingers one day and the next, I can't get them on. I never use salt and monitor it in foods I buy.