here are a few options for you
aloe vera cream
you could take ib profin or other another anti inflammatory to relieve any swelling and ease the pain a bit.
or if you are blistering try patting some milk on it with a cotton ball it works very well.
here is a more indepth description of how to soothe your burn which i got from http://www.squidoo.com/relievesunburn
) Aspirin - You may not have thought of it before, but that pain and redness you're experiencing is you're bodies immune system reacting to what it has deemed to be "damage". What that means is more blood being supplied to the surface of you're skin leaving it flush and warm. That's inflammation...aspirin is an anti-inflammatory. Get it?
2. Noxema (yes, the stuff for your face) - Again, I know, a little strange. But this is by far the number one thing I am aware of for getting an amazing and immediate "cooling sensation" for your skin. Just rub some on, but not all the way in, and feel..."the cool"
3.) Milk or Yogurt - I admit, this is a strange one. However, I've been doing this for years with a mild to moderate sunburn. My mother started this with me when I was younger, and it really is incredible. Works great with the shoulders (nasty part to get sunburn on). Run to your refrigerator right now, grab some yogurt and dab it on...see? Told you so.
4. ) Aloe Vera - Albeit this is an obvious one, it is extremely useful. That's probably the main reason it is an obvious one. Aside from helping that nasty burning feeling you have, it will also help in another way. When you have sunburn you're outer layer of skin (epidermis) is literally starving for moisture. That means every time you stretch that sunburned skin of your's, it is going to hurt more because moisture is the biggest reasons you're skin is so "stretchy". Ever see what happens to the elasticity of a rubber band after it's been in the sun? Same principle.