Hi Danilynn-
Most people who have this surgery will find discouragement setting in after getting home. Everyone is so programmed to how recovery goes for normal surgeries. But this surgery is quite different in the recovery. It's major, major surgery, and it affects every body system. There is a lot of healing that has to be done. It all takes much longer than moct people expect. But it does happen, little bit by little bit. Your husband is still very new after surgery.
The emotional aspect of the surgery is a real thing, and crankiness and depression are the norm. It's hard for the patient and hard for their families. This improves usually in a couple of weeks, so that takes time also. If it doesn't improve after a reasonable amount of time, your husband should bring it up with the doctor. There are wonderful meds that can help.
My husband slept sitting up on the sofa for at least a month, and he was restless all night long. This too will all improve. Getting comfortable can be very hard at first.
The spirometer is something that should be used often.
Just keep reminding your husband of what he's been through and that recovery will happen, and he'll be much, much better in a couple of weeks.
Take care.