i am sorry to say that the pancreas will not regenerate itself. It is known as the most unforgiving organ in the human body with little or no reparative capabilites. God knew what he was doing when he buried the pancreas behind all the other organs to protect it.
Are you type 1 or type 2 diabetic? Has it just been since the surgery? What do you take for the diabetes? Do you have an y pancreatic symptoms?