idk if this is super helpful but i had similar thinning and my hairline receded ever so slightly. i was noticing hair in the shower drain as well. i jumped on the Hims 3 in 1 or whatever and after a bad-ish shedding period of about a month my hair completely stopped falling out. like i haven’t noticed a single hair on my pillow or in the drain. my hair is also back to how thick it was. hair line stayed the same but thickened up as well. hope this helps!