If it's really that bad you might want to see a doctor. Especially if it starts to blister.. you could have a second degree burn there. For the pain, I've heard the best thing is aspirin. You also might want to try sitting in cool water.. anything to draw the heat OUT of your skin. That always works for me.. sitting in a bathtub of cool water. Also.. ice packs or anything like that would help too. I burn VERY easily and really the only thing that works is time, but drawing the heat out of your skin will help a lot, and take some aspirin or some tylenol, and hopefully it will be tolerable enough to let you sleep