Girl. My hair is JUST starting to recover from pp shedding: and DS will be 2 in a few days!
I didn't have thick hair to begin with so the shedding has been a beast! I'm starting to see some thickness and what helped me was weekly co-washing, weeking DCs and leaving my hair the hayle alone! I'm bunning now and in addition to the weekly co-washing and DCs, I religiously strenghten my super fine strands (Aphogee Green Tea Reconstructor, especially to my edges and ends), moisturize (regular condishes uses as leave-ins, especially on them edges and ends) and sealing with a thick coating of grease (before pregnancy, natural oils worked ok but after, grease is the word! Its the only thing that keeps my ends super lubricated.).
So far, so good. I'm projected to hit APL by the end of the year. I just want what little thickness I have to come back. I think I would trade thickness for length since hair grows (it's the retention that's problematic) but the thickness of your hair is written in the genes...IMHO!