Which one is it, Baby, an egg or a chicken?

A new (December'10) study on young women with Premature Ovarian Insufficiency declares that women with greater tendencies for depression are more likely to suffer from POI. POI is basically a very early menopause, where ovaries simply refuse to function.
A study of Peri-menopausal women statistically proves that in the 10 years of peri-menopause, women get more and more depressed, which is closely related to the ever increasing hormonal imbalance.
There are no studies that I could dig out that link the two findings, so I wonder which one is first - depression or menopause? If I acquire a sunny outlook on life, take things easy, banish my tendency to control every aspect of my (and all my friends') life, buy a VW Bug and paint it in all colors of rainbow - would I somehow jump over this 'Enhanced' period of my life with all its side effects?

There is this jittery feel in my entire body that happens several seconds before my hot flashes. As soon as it strikes, I know it's coming, but now I am not sure which I mind more: the pins and needles or the fire and sweat.
Here is the list of things that one should consider to diminish the symptoms of menopause (as mentioned before all websites copy these from each other):
1. Stay cool. Keep your bedroom cool at night. Use fans during the day. Wear light layers of clothes with natural fibers such as cotton.
I sleep naked - environmentally sensitive, since I have less PJ's to wash.
2. Try deep, slow abdominal breathing (six to eight breaths per minute). Practice deep breathing for 15 minutes in the morning, 15 minutes in the evening and at the onset of hot flashes.
Last time I tried it I got a hot flash right in between my breath 6 and 7.
3. Exercise daily. Walking, swimming, dancing, and bicycling are all good choices.
If you know anything about me - this is the funniest advice ever!
4. Chill pillows; cooler pillows to lay head on at night might be helpful.
I had a hot flash on a ship in the middle of the day in SF Bay when the wind was blowing at 15m/h and the temps were in low 50s. No hat, no gloves, tiny sweater, shivering of cold. A cold pillow somehow feels insufficient...

All of this makes me even more depressed and now I wonder if this increased depression could potentially expedite my meno-process and I'd be over with it this much faster... Wild idea, I know, but I am desperate!