try eating several small meals instead of three large ones whenever you can...Avoid foods that irritate your stomach, especially those that are spicy, acidic, fried or fatty... avoid coffee,tea etc... Avoid stress,consider calming activities, such as meditation, yoga etc...sleep with head raised position and have dinner at least 2 hours before sleep..take OTC medications and consult physician if symptoms persist.

U get stomach infection by eating hygienically prepare food or impure water n ice.consult yr dr. over there to get proper treatment as it happened twice in 1 wk.