Sorry to hear about the bad news as cancer always is at any stage. My father-in-law was diagnosed with stage IV pancreatic cancer when they opened him up surgically to remove his gallbladder. Imagine our surprise. He had all of the symptoms you listed including pain. When the surgeon saw the tumor they closed him back up and he was given 6 weeks to live. He felt good for two months and as the cancer spread to his lungs he got weak and was put on oxygen. My husband helped care for him and kept his spirits up. Hospice was great in helping him be comfortable at home. He lived for 4 and 1/2 months. Always have hope, the human spirit is incredible.
Best wishes,
Mandy