Hey, I got banded the same day in Brisbane Australia, and yes i was in severe pain from midday on. Too much wind left behind in the stomach, and yes the chest and shoulder pain. I had a hiattus hernia fixed at the same time, as they discovered it, and that i beleive has made it worst. Just get up or sit up, walking around is best, and take your pain killers. Just not getting alot of sleep in the first week. Appartently they had to leave more gas behind in me as they moved things around to do my hernia.
Know what you're goinmg through. Am getting some reflux, in my 3rd day post op.