Thanks guys!!!
I've been taking Prozac for
years 
so I don't think it was that. I haven't lost weight, though I haven't really gained any either. My significant other, Marty, uses the Rogaine and Nioxin shampoo. It's helped to stop the loss, though it is still thin.
My grandmother on my father's side always wore a wig when I was growing up. I would see her on occassion though without it and she did have hair, though it was thin. My youngest brother, Daren, had hair just like mine, dark, curly and full and started to lose it at 20. It's now almost all gone - kind of looks like Bruce Willis.
Weathermom - I'm not a big fish eater, but thanks for the heads up.
I forgot about the thyroid. I've just been to my doctors so much this year for various stomach issues this year that I think he's going to think I'm a hypocondriac!

I'll give him a call though.
Thanks again! (((HUGS)))