Sorry to hear what you are going through! The misdiagnosis must shake your trust a bit in the medical field. I've done Paxitaxel, Keytruda, and Carbo platin for 6 cycles at 6 hours a shot every 3 weeks - 18 weeks. I am also wiped out. CT scan indicates cancer growth, so not sure how much it helped. They want to to just do the Keytruda by itself and referred me to palliative care. I'll let you know how I do on Keytruda alone as far as side effects. I think I am out of Western Medicine options. I read Radical Remission, listen to William Li on You Tube about diet, and also read about Thomas Seyfried and his theory that cancer is, at least in part, a metabolic disease. I have changed my diet to eleminate sweets and carbs but the cancer is still gaining on me. I'm not giving up though, and will do what I can to keep fighting it. I may try Seyfrieds Press Pulse program. Your comment encourages me to seek out a second opinion. Thank you for sharing your difficult journey.