Hi there I'm right there with ya. I was banded 6/21 and I was pretty miserable. I used the liquid pain meds to make myself get some rest (so i could deal with the pain and not be loopy from sleep deprivation) but my nutritionist did mention that warm liquids also help ease the pain. So decaf tea and the ubiquitous chicken broth have been a great help.
However its day 3 for me post op and I'm pretty sure I'll scream if I even think about drinking any more broth *eww*
But other than warm liquids, yeah, walking and GasX chewables. Hang in there its much better day 3.