It's hard to respond to this because I wasn't there, but generally, that would be an unusual reaction for Juvederm.  Since it involved more of your face than just the areas injected, one possibility is that it is a reaction to the numbing cream itself.  Ask you doctor to test you to the numbing cream on your arm once this has all resolved.  Also, there are other hyaluronic acid fillers.  Is it possible it could have been one of those and not Juvederm?

As for the swelling, you should be seen every few days by your doctor or at least be in phone contact with her/him until it's gone.  And, it should get slowly better each day, so if it doesn't be sure to call your doctor, especially if you develop a fever or pain with the rash.   So yes, the swelling should resolve!