My hair stopped working this week

Why is it that as soon as you think you're set, stuff stops working? I took the CK back out that I had stopped using and I blow dried my hair upside down for the first time. Better but not back to last week yet.
3B, I think w/very thick hair, shoulder length. Fall hair: Low Poo, TS, CK, Aloeba leave in, recoil or RR, plop, BRHG or SMU, no blow dry.