I Am 70 Years Old, Have Had A Hysterectomy &

I am 70 years old, have had a hysterectomy & taken estrogen for many years. Went off of them 3 months ago. Now when I go to bed at night I get extremely hot & itch terribly. No sweating. I have Cronic leukemia & beginning stages of kidney disease. I also have kidney anemia. I receive shots for this. Not sure why I get so hot & itch at the same time. It is starting to make me feel ancious when this happens just wondering what is going on.