You are in surgical menopause, as Elizabeth says, because your ovaries, being no longer present, are no longer producing estrogen. Women who enter menopause abruptly through surgery often find that the symptoms are exaggerated. I call it "going from 60 to zero in an hour and a half" , which is how long my surgery took. This is instead of going through the years of perimenopause and the years of menopausal changes.
What happens normally is that there is a lessening of estrogen production, and your pituitary gland in your brain puts out extra doses of follicle-stimulating hormone looking for a response. This is what leads to many of what is called vasomotor symptoms, hot flashes, etc. Eventually your pituitary gets the message and stops sending out that hormone.
Other tissues in your body have estrogen receptors as well, which explains things like brain fog and so on.
To answer your question about treatment: my doctor's rule of thumb is to use estrogen replacement in her surgical menopause patients until the age when they would be entering menopause anyway. The symptoms off HRT would be attenuated, in part because HRT never really replaces all the estrogen you've lost, (so your body is used to a lower level anyway). In part it's also part of the natural aging process for most of your body's estrogen level to need less as time goes on.
There's another great website that gives a lot of good information on the subject: Survivor's Guide to Surgical Menopause
. It's a great site, and one I go back to frequently.
I hope this helps clear up the :confuse: confusion. That's why we call it the Jungle!