Why would you think you're a 4a? 4a has much tighter curls. At that length, 4a would be the size of a coffee stirrer and much shorter than your hair even if it were the same length.
3b/c, medium-coarse, low porosity, low density
HG: Jessicurl Too Shea and Kinky Curly Curling Custard
Shampoo: nonsulfate shampoo and Suave Naturals sulfate shampoo when needed