I know you've figured out that wasn't an arrowhead.
Just thought I'd show you one found on the beach in Vero.
.... stemmed middle archaic projectile point actually. (Newnan)
Super Thick white patina on it..no telling what the stone under it looks like.
Wrong stone. not an arrowhead since the stone would crumble before taking a flaked edge. Best luck next time (when they are worn this much, a cross section view also can help determine).