Is My Hair Falling Out?

I'm on the verge of 23, no early hair loss in my ancestry, and yet my hair feels thinner than normal while my hairline seems to have found my face to be so repugnant that it has begun a slow retreat to the top of my head. Not that I can blame it, but I think the two should have grown accustomed to one another by this point. Or, maybe I'm just the victim of a widow's peak and paranoia.