you can fix this if you are willing to commit yourself to Fin and Min
This. Take both in pill form in order to avoid the likely scalp irritation and you'll be fine.
I'm a few months out from 27, and I noticed the top of my hair thinning, so I hopped on Fin with topical minoxidil.
As far as I can tell, I feel that I've been VERY SLOWLY losing my hair since I was about 18. If I pick my curly hair out, it looks perfectly fine.
I wash it a day after picking it out, and you won't be able to see my scalp. It's when I avoid washing it for a few days that it becomes noticeable.