In Florida (given the facts above) you are still authorized to use deadly force as long as you meet the "fear for your life or great bodily harm" standard.
Originally Posted by noway2
776.041 Use of force by aggressor.
--The justification described in the preceding sections of this chapter is not available to a person who:
(2) Initially provokes the use of force against himself or herself, unless:
(b) In good faith, the person withdraws from physical contact with the assailant and indicates clearly to the assailant that he or she desires to withdraw and terminate the use of force, but the assailant continues or resumes the use of force.