@Lillian67 I think this cancer journey is hard. If we had obvious physical scars or walked with a limp or had an arm in plaster maybe some people may twig something is wrong. The most useless response I have come across is I dont know what to say or do and then my sister in law promptly ignored me.
Your husband sounds totally frustrated with the situation. Not that he doesnt care but at wits end to make it better.He cant make it better no one can. In time things will be better.
Its a whole new episode in your life. best wishes