Keep hanging in there, Sal. You are smart to let it go. If it gets to be too much, a gentle reminder that you are on his side usually helps.
The person who is closest to them does the most work and takes the most abuse. I had to repeat the words, "in sickness and in health" in my head for my own reminder...and he didn't get nearly as far into treatment as anyone here. Just remember that this part is temporary.
It might be rough for a couple more weeks. Then he'll start to feel better and better as time passes. Congratulations on being done with treatment. You can now enjoy not having to make the daily trips. The less time spent in medical offices, the closer you will feel you are getting to a normal life. For me, it was huge.
Good luck!
Sandy