I'm experiencing drastic hair fall my hair is getting weak im very worried about it please help me im 18 years old?

Hair Loss: Telogen effluvium is a form of nonscarring alopecia characterized by diffuse hair shedding, often with an acute onset. A chronic form with a more insidious onset and a longer duration also exists.Telogen effluvium is a reactive process caused by a metabolic or hormonal stress or by medications. Generally, recovery is spontaneous and occurs within 6 months. B12 shots once a month are helpful.