Hi there, have you spoken to your surgeon about this? What did they say?
#1 - What food stage are you at right now?
#2 - What are your protocol goals on Protein, Water and vitamins, and are you able to meet those goals?
#3 - Dehydration can be a deadly complication, do not take this lightly, that you are unable to ingest liquid or food. You should consider going to the ER right now. Having chest pains, abdominal pains, these are no good.
Above all I think you should immediatly pick up your phone and call your surgeon's office. Many people have come here asking this kind of advise and the next time we hear from them they are in a hospital room on an IV drip. It's no joke.