hi i see your concern for the pain under the rib cage nothing to worry as such are a smoker if yes immedialty quit smoking as soon as possible if its gall stone pain then avoid oily foods if u have fever have some antipyretic drugs such as PCM brufen etc yes if u face such a shooting pain if might be have a origin from lung liver gall bladder D/D liver abcess gall stone(cholithiasis) plueral Effusion lung abcess hyper acidity sprain/strain for now i giving you some advice coz u r on travel period drink lot of water avoid smoking if u r smoker avoid oily n heavy food for medication u can have any pain killer like dortaverine+PCM buscopan tablets all these available in ur first aid box and please donot lift up heavy weights