I Recently Got A Pretty Bad Sun Burn A Week

I recently got a pretty bad sun burn a week ago and it's gotten so bad that I couldn't even walk because the sun burn was on my legs and it would hurt so bad. It's been getting a little better to the point where I can walk around but there's still a lot of pain. Around my sun burn there's a lot of blisters and the skin is starting to turn yellow/orange. Is this normal? Should I go see a doctor or just let it heal?