How can I quickly get rid of a sunburn?

Ok today at school I had track and field. I couldn't find sunscreen so I went without. Now I have a mild burn on my back and forehead. I wouldn't usually mind but my grad is this Friday.. Now I'm not the only one that burned but who wants to have a peeling burn at their grad right? I don't get sunburns often so I have many healthy layers of skin left. If it doesn't clear up by Friday I also have a dance recital, my birthday, and a band concert this weekend. I don't have aloe but is their a mixture I can create using milk or something? Also I used some lotion with sea kelp and vitamin E and it didn't burn, is that something I could use? Thanks ahead of time! Sincerly, worried.