Erythema After CO2 Laser Resurfacing? Can I Use Hydrocortisone 1%? (photo)

I'm 46, today is 3 weeks since I had this procedure done. Doctor was more aggressive in the chicks for my acne scars. Everything was going very well, was very burned/red, skin came off and all that. A week or so ago back home I was out in the cold shoveling snow and forgot to protect my skin with sun block, it was freezing outside with temps in the 20s. I think this is what caused my skin to go "south" per sa, as I developed this skin rash or marks in my chicks, see pics. Suggestions to treat?