How long will this go on?

Frank was released from the hospital on the 27th after being there for 2 weeks. He went home with a feeding IV for nourishment and to get antibiotics. The home health nurse came out and showed me how to administer the IV antibiotics, flush the line, etc. Frank seemed to be doing better but on the 1st started running a fever. I called his home health nurse who called his doctor who told him to go to the ER immediately. He has now been in the hospital another week. None of the blood cultures reveal anything that would cause his infection. He has been on antibiotics around the clock, all different kinds to take care of any infection he may have. Doctors did a TEE, heart catheter exam, and found no infection in his heart. He is still running temperatures. Now, he's had to have a blood transfusion because he's severely anemic. His doctor still thinks it's his pancreas that's to blame and it is still inflamed. He may put a larger stent in his bile duct because it could still be backing up into his liver causing the problems. The worst case scenario is that he may have necrosis of the pancreas. He only has 25% of his pancreas left and you can't live without your pancreas. The doctor can only tell if his pancreas is dying by giving him a CT Scan with contrast but Frank is deathly allergic to Iodine, which is in the contrast.
Now, regardless of what the future holds for me and Frank. Whether our relationship is meant to be or not. Whether it's good or bad. All the doubts I've had........I will not leave him in this shape. It's not in my nature. Not in my heart to do so. I took care of my mom and helped take care of my grandmother. I will be there for Frank. He's got noone else. I am beginning to think he won't make it through this. Maybe God knew this when I first met Frank over a year ago. So, I've had alot of worries during this relationship, but God knew that Frank would get so sick and would need someone. Just like I always believed that I'd never married or moved away from home while all of my sisters did........because God knew mom would need someone to take care of her while she was sick.
I'm tired. Sad. Stretched very thin. I miss you all so much. I love you all. Please keep me and Frank in your prayers.