I have been in full menopause for two years now (no periods and all the nasty symptoms) and I'm 46. I run 75 miles a week and cycle at least that many and it doesn't help my symptoms at all - not to be negative, but every woman is 1000% different than the other, so what works for one may not work for the other so its an utter **** shoot, really. That said, what makes me feel somewhat better (although I have accepted feeling bad most days is how this is going to be for however long my menopause takes) is this;
400mg B6
500mg B12
800mg Vit E
2000mg Vit D
1500mg Calcium
1000 Magnesium
500mg Black Cohosh
400mg Folic Acid
1000mg Evening Primrose Oil
500mg Grape Seed Extract (antidioxidant)
I do this daily, plus eat tofu daily, drink soy milk, eat flax seed on everything... and some of the flashes and that crushing fatique, nausea, headaches lessen a bit. Its sounds to me that you are really estrogen deficient (like I am) and unless you want to mess with your body and take dangerous HRT this is the way to go. Some women opt for antidepressants but I refuse to go that route.
I still suffer (and it is suffering after months and months) with insomnia, but I've been on low dose Xanax and sleep meds which now I have to go through the hideous process of weaning off because they're just too addicting.
Good luck - you will get through this, at least that's what I hope for!
What other blood tests were run? Are you on any medication? You should not be getting dizziness, headaches, and nausea in my opinion from a hysterectomy (I've had one myself). My migraines actually grew less in number and often in severity as well after mine.