I Am A 33 Year Old Woman. I Have Had

I am a 33 year old woman. I have had CTE for over 18 months. Recently I tried Rogaine. I applied Rogaine 5%foam for women to my frontal hairline only, for a week and a half. I began to have a massive shed. I decided to discontinue the Rogaine. My question is how long will the shedding last? I have been off for a week and am still experiencing a huge amount of shedding. My hair is already extremely thin front the CTE so I am terrified of losing what little I have left.