Scalp problems!

My scalp has been going crazy lately. I’m not sure if it’s dandruff or a dry scalp or something worse. I’ve tried different dandruff shampoos but only certain ones work. But sometimes even after I used them the flakes get bad. I even tried using coconut oil but I still had flakes. What makes it worse is I have a picking habit. I will pick at the scabs, flakes, and flake patches. Also sometimes I get these patches on my eyebrows and get flakes there too.