am I balding?

I used to have a very thick hair, but as I started working abroad, I observed that I already have a lot of falling hairs. And it's an everyday occurrence since my Demark days. :( Most of my friends are experiencing the same too. Maybe, it because of the cold weather here. And everytime we take a bath, we use warm water and they said that it's not good for the hair. I already started using not so warm water in taking a bath, but I'm still having falling hair. Should I start taking hair loss shampoo to prevent hair loss? If you have any suggestion on what to do aside from using a hair loss shampoo, please feel free to drop me a message.:)