Maybe it would be worthwhile to go back on hormones. If you still had all your parts, you would probably be producing more hormones than you are now since intact women's ovaries produce hormones into their 80's.
Went off estrogen therapy Dec. 2012. Had a full hysterectomy June 1978 at the age of 39. Since going off therapy I started getting night sweats and now along with that I get palpitations which wake me up. I scheduled an appointment with my cardiologist for Jan. 15, 2015. I have had previous heart tests including a stress test all normal. I am very frustrated and irritable from not sleeping well. Aside from that I am healthy.