I've been having this issue since I was 13. My parents got so worried that they asked for our family doctor consultation.
He said that it is perfectly normal for teenagers especially female to experince hair loss when they hit puberty. However, it is still best to curb the issue to prevent balding in the future.

I am currently using Himalaya hair loss thing. Just apply at the scalp every night before sleep for three months and results will show. So far I've been only using for a few weeks but I don't see any improvement. But I'll use it continuosly and will do a feedback after 3 months.


There is also a home remedy for hair loss that I have yet to try out. Its real simple :

Wash hair without shampoo or soap, rub SALT into SCALP for 10 to 15 minutes then shampoo as usual. Repeat once a week for 5-6 weeks.
(via- http://www.greathomeremedies.com/hair.html)