Do mention your dad’s unhappiness to the doctors when he goes back for the next appointment. They can put him on anti-anxiety meds for now. If radiation is in the cards, then he still has a long way to go. The meds will help him relax a bit an sleep. It’s hard for caregivers as there is not much they can do. There were people my husband did not want to talk with on the phone while he was in treatment so I took those calls. He did not want to explain/complain/appear to be cheerful when he wasn’t. All of that was understandable. He shouldn’t have to play the part of the cheerful patient. The same may be true of your dad.

She stood in the storm, and when the wind did not blow her way, she adjusted her sails... Elizabeth Edwards

Wife to John,dx 10/2012, BOT, HPV+, T3N2MO, RAD 70 gy,Cisplatinx2 , PEG in Dec 6, 2012, dx dvt in both legs after second chemo session, Apr 03/13 NED, July 2013 met to lungs, Phase 1 immunotherapy trial Jan 18/14 to July/14. Taxol/carboplatin July/14. Esophagus re-opened Oct 14. PEG out April 8, 2015. Phase 2 trial of Selinexor April to July 2015. At peace Jan 15, 2016.