Too bad your all the way in Deltona!
You need to get a leakdown test done so you KNOW its your headgasket.
You said it overheats a little. Is any coolant disappearing? If a cylinder is burning coolant,it can look different that the other ones. Inspect them especially the suspect ones.
If coolant is disappearing with no sign of burning, check you radiator cap. If it cant hold the 15 psi,the coolant will just boil off. Id do a leakdown test next though...
Good luck!