Kidney Transplant and Pancreas insufficiencies

I am 7 years post kidney transplant and have recently had a rejection epsiode. The doctors not only put me on high doses of predisone but weekly therapy of cytagam infusions. During this time my stomach problems started to get worse. I have been through multiple blood test,endiscopes and cultures. Three weeks ago the digestive specialist diagnosis me with insufficiences in my pancreas. He put me on enzymes and I thought it was helping. Any insight or information would be greatly appreciated. As of right now even with the medication water causes pain, nausea and acute diarrohea.