Is my hair damaged? :<?

I straighten my hair quite a lot now, and I don't know if these signs are pointing to hair damage. I sport short hair now, back then, before I straighten, my hair would become straight when it is wet. Nowadays...it curls MORE after it gets wet (By A LOT) Is this because the straightening effect is just wearing off and the hair just wants to curl, or the hair is damaged? I'm getting a bit apprehensive, for I am thinking about using hair dressings to straighten my hair, but now it curls MORE when it's wet...I fear that it won't work.