Why am I shedding so much hair? Will it grow back?

In females there are too many reasons for shedding of hair as it can be inferred from your history it could be metabolic,nutritional deficiency,drug, stress & so on. Please consult a Hair Restoration Physician & get your tests done. If possible get a Hair analysis done. The cause of hair fall will determine that the hairs will grow back or not.

There are many causes of shedding, rather than just one. Three things are needed to diagnosis hair loss: 1) a full history of the patient's hair loss 2) close examination of the scalp and 3) review of blood tests. Without these three it's not possible to determine what is going on. I would advise to see a dermatologist to review these 3 parameters. Once that diagnosis is known, treatment can be planned.