Florida is an "equitable distribution" state
Same as Mass.
If your lawyer isn't already working on things it can take about 30 days for a court date but once the date and amounts are set by the court, they will go back and add in what should be getting paid now.
You could be looking at 80% of what you were getting with both in the house.
Depends upon how much he makes a year,
Enjoy the 4th with your children. Things will get worked out. No need to waste a good day in worry about something that will work out ok in a few days.