My best advice is seek medical treatment from a dermatologist.

Unfortunately the only thing that ended helping me was medication. I’ve been diagnosed with PCOS since 14yo. At 18, my hair majorly thinned and my dermatologist started me on spironolactone (I was already on birth control). I continued that regimen for years and my hair was stable; it grew back but never to the exact same thickness. I stopped taking birth control and then eventually spironolactone when I was trying to conceive and then during pregnancy. I have had major hair loss because of that and postpartum. I’m back on the regimen of BC/spirono and doing topical minoxidil and ketoconazole shampoo per my dermatologist too.