C-section moms

Anyone who has had a c-section have you experienced any horrifically painful gas and pressure in your chest and upper back no matter what or how much you eat? And if so what where you able to do to alleviate it and how long did it last? Not sure how much longer I can survive on just activia. And before someone says doc I have already talked to my doc and she suggested simethicon which has done nothing. Thanks in advance!