I understand your feeling.
Usually hair fall depends upon some factors such as familial baldness, water we use to bath, and the nourishment we are giving to them, over skin secretions, dandruff. Any if the above factors may cause hair fall.
You have mentioned that you have white scales along with hair fall and dry mess of scalp by this itseems that you developed dandruff and that might be the cause for hair fall and dry scalp may be because of low water intake. You need to take 2-3 liters of water a day. When ever you have bath try to dry your hair properly. Inadequate drying of hair can also lead to hair fall. And do not apply soap and apply the shampoo daily. Use only the shampoo that which can be used daily. While buying kindly see for the instructions. Use clean water to take bath not the hard water.
Even after taking all these precautions then you need to consult dermatologist.