Aren't there some products to help pull your curl down? Doesn't KC have one? I forget the term... The opposite of "shrinkage" - lol! I never look for that, so I can't recall!
It is possible the new found health of your hair has caused the tightening. Of course hormonal changes can do it, too. My curls used to be tighter, had gotten loser, and now have gotten tighter again after the babies. (While I was pregnant I went wavy, even!)
2c/3a/3b, Fine/med, Dense, high porous, & normal elas.
Lo-poo - Renpure Keratin, SMR, Giovanni SaS
clarifying - mix Johnson's H2T with low poo
Co-wash - Suave Nats. clar. or coco.
RO - GVPCB, Ion Eff. Care, TN.
LI - SMR, Cure Care, or RO
Seal - MO or Jojoba
DT - + honey, ACV, & EVOO to SM masque & GVPCB
PT - Gelatin!, CNPF
Styling - FSG, AIF, BRHG, LALS/PS, GF curl spray gel, SM Souffle/Smoothie, LOOB
Oils - MO!, EVOO, jojoba, GSO, SM Elixer, EVCO, VO5 Hairdressing