Mike, when I related my experience in healing it was not unique to me but common to almost all my friends who had the same surgery.
It will get better, like you I couldn't get comfortable and never slept longer than 30 minutes at a time before I had to try to find another position.
In three months you will start to see things turn around for the better, six months and you will only get sore when you over extend your range of motion, in a year you will be glad you had the surgery but will do everything you can to keep from having your other shoulder worked on.