Thank you very much for the useful information.
Honestly this problem will settle down gradually as you return back to your normal activities (physical) gradually & slowly, and when your medications will be stopped (tramadol/oxynorm can both give you similar effects in the tummy).
I will suggest you to take more fruits and pulses instead of meat. And veggies in moderation as most of these are gas producing.
Try prilosec (over the counter available) for few days.
And do not lie flat for at least 3/4 hours after the meals.
Small frequent meals instead of 3 large one's will be more helpful.
See how you respond to these measures. Hopefully the problem will settle down soon, but in case if this persist, does not improve or gets worse, have this evaluated by your doctor as you may require prescription strength drugs (like nexium and maxolon) to treat this problem.
Little bit of physical activity daily (walk) will also help.
I would have been worried too if I were at your place, but let me reassure you that this is a treatable condition and carries a good prognosis with appropriate management.
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