Good luck with the people white coats, AND, do not borrow trouble. Relax, relax, until you have something to worry about. I know it is easy for me to say it, BUT, you have to try to keep yourself in check....it will be helpful overall. Also, lots of people lose hair at various times in their lives. I know a vitamin def. can be the cause of it, among other things. Really, I don't know that hair loss is a sign of cancer, at least not in the early stages- which you would presumably be in, usually it comes about as a result of the treatment for cancer. So, deep breaths, positive thoughts, ok?