I was having a issue like yours a while ago and I so I started to do weekly protein treatments with curl junkie repair me followed but a moisturizing deep conditioner and now I have no issues. My issue was in the back of my head were my 3c hangs out. It was not curling for anything. It was just hanging limp and sad. I realized after doing that I need a trim but it was nothing really serious because I hadn't trimmed in a while. Now my hair is super happy and I have noticed my 3c section is a lot bigger than I thought it was before.