Just like the other lawyers instructed, notify your insurance company immediately. If they are going to cover you, they will assign a claims adjuster. If you are not covered by your insurance seek an attorney in your area immediately. Good luck.
Your insurance policy will control, read it carefully. In Florida, many homeowner policies exclude dog bites; you have to buy a rider if you want coverage. In many Florida counties, such an event is enough to have your dog declared a dangerous dog.