hi, I just got back from myrtle beach on friday night. Thursday afternoon I went swimming with my brother and 2 sisters. I put spf 70 sunscreen lotion on because I always get burned but I forgot to reapply, we were only swimming for 2 hours though. I went the entire week without getting burned. Friday we got up around 4:30am to take the tents down and leave. 6:30am went to take one last look at the ocean, but by then I was shaking and extremely cold. I couldn't stop shaking. I ended up throwing up. Then I slept for the next 4 hrs on the drive home. yesterday I noticed my sunburn on my arm was blistered up. It hurts really bad when I try to move it a lot, especially when I am changing my t-shirt or doing something else. Yesterday was the first time I noticed my arm was getting swollen. I also noticed some yellow stuff on my shirt where my sunburn was? I have been putting aloe on my sunburn, and also taking ibuprofen for the pain. But I've never been burned this bad, and I am not sure what I should do?