I thought a lot of people aspirate the last egg at home. Or would that be first egg? It seems like if the egg is right there, it would not be hard to do.
I've also seen on corn snake forums people talking about massaging the egg out.
Any particular reason you are going straight to the vet instead of trying something at home first?
I am NOT trying to recommend anything here. I have absolutely no experience and am not even close to qualified to do so. Just trying to stimulate discussion so we can all learn.