An old man's T level is still way too high to allow good feminization to occur. A low dose of E will do almost nothing to suppress T production. The only effective way to suppress T by using E alone is through strong injections, which are not recommended for starters. It is therefore possible that your hair loss is being caused by DHT. If you can't get a T blocker, you should at least try to get a 5 alpha reductase inhibitor such as finasteride (or better yet, dutasteride if you can afford it.) If the hair loss is being caused by DHT, such medication will be very useful.
Given the similarity between your symptoms and mine, I would be worried about another problem, one that is much harder to treat. Normally, estradiol reduces loss rates, so it is worrisome when things go the other way. I have had the same problem since starting estradiol. My strands are not thinner (indeed, many are thicker), but 80% of them have fallen out. It is only in the last few weeks that I think I have discovered the complex problem. I have recently been diagnosed with a fungal scalp infection. Foods with active yeast (usually simply "yeast" on the ingredients list) cause it to flare, resulting in itchiness, white buildup on the scalp, and morbid hair loss. Initially, my white buildup was dismissed as dandruff; even one dermatologist said that, but now I think I know the truth. It is clear that the white buildup (and indeed the dandruff itself) were caused by a fungal overgrowth condition, likely a yeast infection. Eliminating active yeast from my diet is already helping after only one week, and I will soon start a course of antifungal medication; the two changes combined will hopefully stop my problem.
You may be wondering what that has to do with estradiol. Unfortunately, estradiol increases the growth and survival of potentially pathogenic
Candida albicans yeast. A systemic yeast infection may occur, especially in people with compromised immune systems. I have low immunoglobulin levels. I would strongly recommend 1) seeing a dermatologist to check for possible fungal overgrowth on the scalp, which may produce no symptoms until it is too late to save the hair, and 2) having your blood tested for possible immunodeficiency, even if you have been tested in the past. My immunoglobulin levels were once normal, but not anymore.
Here is an article about the effect of estradiol on yeast:
http://jid.oxfordjournals.org/content/181/4/1441.full.pdf
