Talk to Gastroenterologist on Belly Pain

Assalam-o-Alaikum.. mai factory worker hu mera kam proper beth ke karne wala nhe walk , khary or seat pe beth ke.. Meri belly me aksar pain rehti hai.. khna khaya ho ya nai fark nai parta baz time to is had tak pain hoti ke sans lena muskil ho jata hai.. kuch week se pain ziyda hone lagi hai phle to week me 1se 2 dafa hoti ab 4 se 5 dafa hoti hai... I don't know ye mera weham hai ke belly weight b ziyda ho raha jab se pain ho rahi i think mera Weham he hai...