L.B.
Interestingly, I just turned 45 and wondered the same thing. I had a child at age 40 (almost 41) and yet I've been experiencing what appears to be early signs of Menopause too. And, all the other generations of women on my side of the family had very late Menopause (late 50's or early 60's). So, I began to do research on it. And, I also had been trying to lose weight and was eating lots of SOY products. I saw in your note that you drink lots of SOY milk...so maybe we are both experiencing some of the issues they are now finding with SOY. See the information I found below:
Myth: Soy estrogens (isoflavones) are good for you.
Truth: Soy isoflavones are phyto-endocrine disrupters. At dietary levels, they can prevent ovulation and stimulate the growth of cancer cells. Eating as little as 30 grams (about 4 tablespoons) of soy per day can result in hypothyroidism with symptoms of lethargy, constipation, weight gain and fatigue.
Found in article of: MYTHS AND TRUTHS ABOUT SOY FOODS: Sally Fallon, Mary G. Enig, Ph.D. and Mike Fitzpatrick, Ph.D.
This was one of many articles I found where too much SOY can interrupt the female hormone cycle. I've only had 3-4 periods this year too. And, I've had many other possible menopausal symptoms. The other articles I read note that SOY is processed or read in our bodies almost like an ESTROGEN. So, our bodies would be receiving too much and therefore it may tell our bodies to stop producing any or other adjustments.
I don't know much else to tell you, as many times we have to do own research and determine what we can do on own. So, in addition to gaining counsel from doctors and reading independent research and gaining advice from friends, etc. we must take charge of our own health. You might want to try switching back to regular skim milk and leaving off the SOY milk for a while.
Hope this helps. Many Blessings - L.