If it isn't cleared in the morning I would make an apt for the Vet on Monday. Our vet told us to get the benadryls in pill form and to give one of our girls 1/2 when her jaw and neck just swole up out of the clear blue. He made sure there was no bite marks and said we could buy the dog pills or just get the people pills and cut them in 1/2. People pills are way cheaper and are cleaner than any animal med thanks to the FDA.
Hally, The Olden Golden 12/5/1999-
Indi, (GSD) 8/4/2011-
Dixie, (GSD) 8/11/2011-
Sassy, (Rottie) Born 10/9/1999-6/12/2006 RIP