Will the shrunken collagen from the CO2 in my face come back?

I was not aware that the CO2 shrank collagen and made our skin flat. I did my setting on a 6 because it hurt so bad and I think it went in my favor. My dr assured me I wouldn't lose volume and my cheeks and lips are thin and everything feels different like drinking from a bottle, talking, and brushing my teeth. Will the shrunken collagen come back? Will I ruin my face if I take collagen and tablets in the meantime?