It could be that the water in your area is either much harder or softer than where you were in the Phils (your local water company will tell you exactly what Ph it is....or buy a test kit from somewhere like Boots the chemist)). With that information you can use a balancing shampoo.
Also ask your Doctor's advice. He can get an appointment with a skin specialist/Trichologist for you, who hopefully will get right to the problem rather than experimenting forever with different products.
