You are suffering from hormonal changes causing Telogen effluvium causing hair fall. It's completely stoppable even regrowth of hair is possible with certain medications without any side effects. Treatment depends on the grade of hair loss. So, it's a must for diagnosing which grade, you are in for an effective treatment. Please  send photos of your head, by direct online consultation for accurate diagnosis and proper treatment.

Can be telogen effluvium...detailed evaluation required

Telogen effluvium is a form of hair loss characterized by increase in hair shedding. It occurs more often by a disturbance to the hair cycle. The hair cycle typically has three phases: 1.Anagen or growth phase. 2.Catagen or transitional phase. 3.Telogen or old phase. This disturbance causes anagen and catagen hair to change into telogen which usually start falling with in a month. This can continue for 2 to 3 moths irrespective of treatment. The triggers can include:- Fever, Stress, Diet, Allergic reactions, medications. It is common and usually 95% fallen hair will regrow back naturally. You can seek a dermatologist advise to grow your hair healthy and faster than usual. The medications that are being prescribed will help them grow fast and health but will not stop the fall.