How to reduce hair shedding/grow hair back and make it thicker?

I (F20) have been shedding hair for quite a while now. My hair actually used to be pretty thick a few years ago, but I started having weird symptoms like weight gain and bloating along with hair shedding in my first year of uni.

I am diagnosed with PCOS since more than a year now and I feel it may be the reason. But I’m curious to know any other ways to help grow hair back or make it thicker.

For extra info, I’m taking Spironolactone 50mg everyday, I’ve read that it does take 3-6 months to see hormonal changes with anything apparently? But it’s been more than a year and I’m only really seeing baby hairs grow in.

Thanks!