so I'm on vacation with my family and had to go to the beach, and no matter how many times I explained that I couldn't be in the sun for long they wouldn't listen.... I used sunscreen (50 spf) but my chest got sunburnt !! I'm so worried now, I've heard stories about people who get sunburnt on accutane and end up getting huge blisters that scar . Help, what should I do / expect?