I am sorry to learn of your loss.
Your question cannot be answered without more facts provided. With all due respect, this is not the proper forum for your question. Anything you post on the Internet can and will be used against you.
You need to contact an attorney ASAP.
I am sorry to hear about your ordeal. Complications are not necessarily indicative of medical malpractice. To prevail in a medical malpractice claim, you will need to prove that the defendant deviated from the applicable standard of care and that that deviation caused you to suffer injuries and damages that you would not have otherwise suffered. Many surgeries have known risks and potential complications that can occur even in the absence of medical negligence. If you suspect that you might...
All you can hope to get under Tennessee law is fair compensation for your daughter's damages. What are her damages? Did she incur any medical expenses as a result of ingesting gluten? If she became ill, how long did it last? Good luck.