It sounds like your daughter may have contracted an infection during operation, postop, periop. I am concerned about the jaw pain. That is not normal. Neither is all the vomiting. See an infectious disease specialist independent from the surgeons who did the tonsillectomy. I said that because the surgeon may just sweep it under the rug. No surgeon wants to believe they may have a problem postop. Get my drift? How long has your daughter been postop and how long on pain med? Stop the pain med IMMEDIATELY. She is probably allergic to it or just is immunosuppressed right now and cannot take it.