Get a big ass bottle of vinegar and pour it all over your body and let it sit for a few minutes in the shower. Then wash it off in cold water. After that, apply aloe vera and you'll be fine.
BTW, living in Florida, you develop a nice base tan unless you're really fair skinned. When we went to costa rica for our honeymoon, I didn't put any stock into that whole "the sun is a lot stronger the closer you get to the equator". Well since CR is only 10degrees north of the equator, we burned in 45 minutes when it was overcast. We burnt so bad, we had to stay inside our room for the rest of the day with the a/c cranked down to the lowest setting it could go.