i agree with the benedryl it is 1mg per pound - is there not an er vet you can call as they can walk you through it over the phone - get to the vet as well when they open - poor baby - they should not have given all that in one day
the bordatella shot is stronger than intranasal - it last 1 year and intranasal 6 mos i believe
also keep in mind the next vaccine will be much worse after reacting to this one so make sure vet discusses with you as some have to give benedryl before vaccines to make sure no reaction