How do I get rid of sunburn irritation faster?

I got a pretty bad sunburn Monday and it still burns really bad. My chest isn't as red, but my shoulders are still as red as they were Monday night. I have tried aloe lotion, and it seems to not be helping the irritation. I got a wet washcloth and let it sit on either of my shoulders a Tuesday, but it didn't really help. I don't have an aloe gel and i'm not planning on going out to buy it. I have a bat mitzvah to attend this Saturday and I'd really like for the redness and irritation to go away by then.. Any suggestions?