Help with new sickness

My fiance joined this website when he was diagnosed last Sept with Linitis Plastica.  His screen name is Roadking.  Since he has last posted, he was admitted to the hospital with severe stomach pain.  He ended up with a perferated intestine.  He was in the hospital for almost 3 weeks.  He had emergency surgery and they put on an ostomy bag.  His cancer has spread all through his body, including his lymph nodes, intestines, and colon, but still not in his liver or his kidney.  Doctors have given him 3-4 months.  Since he has been home, he is eating less, drinking less, and has vomited 2x, last night and tonight.  I dont know what this means.  He seems to sleep a lot and when he is awake, very "out of it".  Can someone please help me understabd what all this means.