Hi there and I feel your pain. I was banded on April 25th, in TJ by Dr. Ortiz. I also, have terrible gas pains, and there is a noticeable "lump" (over all the other weird gassy pockets)by my port incision. I thought for sure after a few days that it would subside, but it hasn't. I guess it will take quite a while to get out all the op gas. Don't forget that what we had was surgery, "minimally invasive", but surgery all the same. We were poked, blown up, organs shoved out of the way, and an artificial "vice" placed around our stomach, how are we supposed to feel? I would say to keep hydrated, as that will help in getting the aenesthesia out of our systems, and to be as active as possible, to help dissipate the gas.
The coughing may be lack of moving around, and if she is heavy, as I am, the heart strains under the added pressure, and doesn't work as well in cleaning out the body. Make sure that she sips plenty of water, luke warm or warm, and keep moving around, it really does help. Otherwise, time will do the healing. Best of luck to you gals.