I'd forgotten about the use of "PAM" (not quite awake yet, ha)- you're probably right, Malum. More than one snake-owner has messed up when using that stuff. Personally, I've never used it.
IF PAM is the culprit, do your best to help the snake flush it out of their body, get vet help if & when you can, & hope for the best. Rest & supportive care.
If you can't get on the road today or the vet is closed due to bad weather, try for a phone consultation- ask what you should do if it's PAM toxicity. Better the vet sees the snake in person though, for more accurate diagnosis.
If you need a herp vet: https://members.arav.org/search/custom.asp?id=3661
You mentioned going to the emergency vet- I'd call first to see if they are experienced with snakes.
(As far as internal parasites or egg-binding, they could always be contributing factors in a snake that came with mites, & some internal parasites don't inhabit the GI tract- I was actually thinking about snakes that get lungworms, which could cause thrashing around, etc.)
I hope she makes it...