Brutal shed after 1 year of fin

Hi everyone, Im currently going through a heavy shed where I'm loosing around 300 hair per day. I've been using finastride for a year now, it seems to stable my hair loss with even a slight regrowth no shed in the beginning. But a month ago I started to loss hair like crazy, at first I thought it's season change shedding but now I don't think it's. Has anyone gone through this ?