Solder on - save the worst for morning when the clinic is open, if need by then. Although - knock on wood, haven't need emergency care for years.
I'd consider you lucky with your situation, you have a RN on call 24/7 - She should be able to help determan the real needs of the moment.

If the discussion was about chest pain or numbness or something related to heart / stroke / brain - bit the bullet and head for emergency room . . . .

Too bad about your injury . .  hope you heal quickly.