I hope she eats for you today! It sounds like she is trying to pass a urate. Dehydration can cause that.
Personally, if it was my snake and she doesn't eat on her own today I'd assist feed her a thawed/warmed mouse pink tonight, wait three days and offer a live hopper mouse again, if she doesn't eat again, assist feed again. Repeat until she eats on her own. I'd actually tube feed if I took in a snake in her condition. When done right it's not as stressful as assist or force feeding and they don't have to expend the energy swallowing prey. But that is something a vet or experienced keeper can help with.