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.

We need to access the reason for the hairfall. After starting minoxidil hairfall is expected but only for few weeks. The reason of such heavy hair fall needs to be investigated and taken care of.