My husband was diagnosed with stage 4 in October. Same scenario. He’s had 3 rounds of chemo. Had 13 days off during which he feels better and eating better. We start round 4 on Monday and the two following Mondays. He will have a CT scan 1st week of Jan to see if there’s any progress. Surgery was not an option for him. I don’t have any answers for you but we are staying positive despite the prognosis. We are with Cancer Specialists of North Florida which is part of MD Anderson. We are only a few miles from Mayo but Im just not sold on Mayo for various personal reasons. Stay positive!!