They pump so much gas in you to be able to do the surgery it can take at least 3-5 days to get rid of it.
It can settle in your shoulders which is sometimes worse.
Try to move as much as possible.
Walking is going to help get the gas moving out.
Take your pain medicine to help the pain from it.
Sometimes holding your arms above your head also will help.
This is one of the worse complications sometimes.
IF you feel short of breath or pain runs down your left arm or into your jaw get to the hospital.
Chances are though that it is just the C02 as everyone has that after surgery.
Hopefully it goes away fast!