Aloe Vera! Anything with it. I've used lotions with it, but I suggest the green gel stuff. It feels sooo good on a sunburn because it makes your skin feel real cool.

You need to take a shower, but maybe not right away. It may hurt a bit at first, but just have it on warm water, and not HOT. It'll feel a lot better once you get used to it.

I hope you feel better! Sunburns really suck.