From what I read on this site from Univ of Florida, there are 24 species of Oaks in Florida. 10 of them are in the White Oak group and 14 from the Red Oak group (also called the Black Oak group)
http://edis.ifas.ufl.edu/uw292
After your seedling grows a bit more, you may be able to match it to one of the species in the above link.
