Is she still eating? Or have you tried offering her food yet?

A snake can usually grip onto your hand with its tail and support its entire body...can she do this?

I have lost a snake to IBD, and the first signs were a paralyzed (and eventually swollen too) back end and food refusal. So to be safe, I'd make sure this snake (and the one that she came with) is in a STRICT quarantine. And get to a vet asap.