Stmch or acdty pain aftr eat outside fod

I go to my relatives house for 1 week , where i eat every time paranthas instead of chapati , on different differnt time , there is no schedule of eating . when i come back home i feel some stomach pain whenever i take pantocid dsr it will give relief but after some time pain come again . then i go to nearest medical and take medicines for a week , then i feel normal but after some time i thinking that my stomach is aching after that my stomach is aching and whenever i think my stomach is aching . Now the problem is i am thinking or whenver i eat outside food my stomach is like blowing or someone is putting air in my stomach . please suggest me treatment i am 23 years old. my whole life ahead. Can i have to suffer this whole life whenever i eat outside food my acidity problem will start ? it dont have any solution ?