Sleevy,
I'm on day 5 now and I agree with you the gas pains are the worst. I'll tell you what I have done to help and I am much better today. I definitely walk every hour. I know this may be TMI but during my walk I go sit on the toilet also because at least for me it is mentally easier to pass gas's while there. I have used the gasx strips which have helped a little and the thing that I think helps the most is lying on my left side with my knees bent. Lots of pillows! I did that two nights ago and burped and farted ALL night. I am still having pains but they are not nearly as bad today. Oh, and a heating pad between my shoulder blades (where my gas pains are the worst) has helped immensely.
I also had hiatal hernia repair so I feel a little constricted around my chest but it's not so bad. One last thing. I'm allowed my liquid pain meds once every six hours but it was only lasting for three hours. I am now taking 1\2 a dose every three hours which has really really really helped
I feel for you right now and hope that some of this helps.