Is it wind burn? How do I treat it?

I came home from a camping trip and while we were there we stopped at a nearby beach to look at tidepools. We wondered into the marshes and relaxed a little. It was cold out and VERY windy. Sand would whip your face all the time. When I got home I notices around my lips and on the tip of my nose I was flaky and a little red. It stung when I touched or applied moisturizer. Now mind you I was wearing sunscreen when we were at the beach but a very thin layer that could have worn off. I tried applying aloe Vera gel (green kind) and it stung like crazy and then faded off a little. It's been one day to two days since I found out about my wind burn/ sunburn. What is it exactly? How do I treat it so it will go away quickly? What should I not do? I want to get rid of the flakeness and redness before I go back to school (it's Saturday). Please help me!