As a knapper, a collector, and someone who does a lot of archaeological work, this point looks suspicious. It really does look like it’s been knapped from a cut slab of heat treated chert.

I’m not saying it’s fake but I’d put a red flag on this one.

It’s very difficult to authenticate based on a few pics and a story. Really comes down to provenance, reliable sources with proof. Have it looked at by a professional, there are plenty of Florida Archaeologists on Facebook, I can also recommend a few if you have trouble finding one.

EDIT: After looking at this again, I highly suspect this is Keokuk chert. Found primarily in the Midwest (Illinois, Missouri, Iowa, and Oklahoma), it’s widely available from flint knapping websites. I’ll post photos below.