What Causes Hot Flushes Along With Night Sweats And Weight Gain?

I have been in menapause since 2001 when i had a partial hystorectomy. Dr. put me on Effoxer XR 150 mg. for my hot flashes, night sweats and mood which helps. For at least 5 years i have been telling my doctor that i don t have any energy, tired all the time, Problems sleeping up on an average of 3 times a night to urinate, it s all i can do to get up on some days. I have Gained 50 Lbs. in last 2 years i eat good foods i DO NOT drink soda or coffee I drink mostly water some 2% milk. My memory is Not as sharp as it has always has been. I am constantly Thirsty. I finally told the Dr. to do some blood work. My thyroid Tsh w/reflex T-4 free 1.93 Hemoglobin A1C 5.7 Vit D 17 Lymphocyte 3.4 ALT 42 Cholestrol total 290 HDL 4.4 LDL 186 Triglycerides 298 Ratio 6.6 Liver is Fatty I m taking 50,000 Vit D 2xweek My vit D came up to 25 then switched to 50,000 1xweek now its back down to 18 This has been going on since 11-09-2011. Dr doesn t seem to conserened I have to do something. I m tired of feeling this way life is just passing me by and I have grandchildren that i don t have energy for. Please help Thank You Sandi