If it was my snake I'd be headed to the vet right now...not making an appointment. This, I think, would qualify as an emergency?
...beat me to it. But yes, this is my thinking.

Imagine if it was a mammal. When my puppy broke her left front leg, I didn't CARE that it was a holiday weekend and it'd be three days until my vet could see her. I insisted he see her immediately, she was in pain and needed treatment...and when he refused (the advice he gave was to shut her in her dog carrier for three days until he could see her, wtf!!!) I drove to the next city over to take her to a 24/7 emergency veterinary clinic. Paid through the nose but you can't put a price on having a sick or injured animal treated post haste!