You are suffering from hormonal changes causing Androgenetic alopecia 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.

Good evening. When it comes to excessive hairfall issues, proper examination and investigations( if needed ) is quite important to come to a diagnosis. Visit a nearby qualified Dermatologist if it gets worse ( in person consult is preferred ; online consultation if you dont have the choice). In the meantime, have a well balanced diet, eliminate undue stress and get plenty of sleep. Hair treatment results tend to be slow,and start around 3 months after any treatment is initiated so always patient when it comes to hair.