I really doubt it's the cowashing. I would guess it is due to hormonal changes or simply getting older. My hair started thinning in my late 20's, early 30's. and I wasn't CG. your hair and skin changes throughout your life.
2C-3A/ Coarse/ Normal to high porosity/ SW Florida
Cleanse: *CJ Daily Fix, AIA Coco Cowash, Trader Joe's TTT condish, Shea Moisture poos
Condish: CJ Smoothing, Curly Kinks Renew, Darcy's Pumpkin, *CJ Curl Rehab
Enhancers & 2nd day products: *Okra gel or FSG, Uncle Funky's CM, CJ Pattern Pusha
Gels: MGA sculpting, Giovanni LAN, Spiral Solutions FHG, LALSG, *JC Spiralicious