I got e great reply about this question in yahoo answeres and would like to share this with you ladies.
Erica fortes soli superant's reply (see below):
You're confused about a few things.
First, it's perfectly normal to lose 50-150 hair per day. Are the hairs coming out long or short? If they're long, and have a small white bulb at the end, this is perfectly normal. If they're short, it could be Telogen Effluvium (temporary hair loss) which can be caused by stress, diet, vitamin deficiency, thyroid issues, and more.
DHT doesn't make hair fall out. It causes hair miniaturization. When a hair falls out naturally, the action of DHT on the follicle causes it to shrink, so the next hair that comes in is smaller in diameter. This is why hair progressively "thins" in MPB, and doesn't fall out all at once. In both men and women, hair tends to thin as we get older. This is just a normal part of aging. Ask any 60 year old woman if her hair is as thick as it was at 30. She will almost certainly say, "no." The difference between male thinning and female thinning is that males lose their hair in a distinctive "pattern", starting at the peaks and crown, while women's hair thins all over at the same time (diffusely.) The best treatment now available against premature hair loss is Finesteride (brand name Propecia), which is a drug that blocks DHT. Dutasteride is a more powerful DHT blocker, but is only approved for prostate issue, not hair loss (though some physicians will prescribe it.) Minoxidil also works for some men and women by increasing blood supply to the follicles.
As for the low T, well that make sense since you no longer have your T production factories. Still, you should see an endo to make sure there are no other problems. You may just need to go on a small supplement of T. The 4 mg of estrogen you are taking is too high, and since E is a T suppressor, it could also be the problem. What are your E levels?