You are suffering from constipation
that is difficulty in passing the stools and gases.reasons for this condition can be inadequate intake of fibre in diet, less water or fluid intake , decreased physical activity and even few medications .so you have to take care about these things.
omex that is omeprazole
is a antaacid used for acidity, for constipation have laxatives drugs like dulcoulax or herbolax 1 tab. at evening times.
regular exercise is must and including yogurt and fibre rich food stuffs like oats improve bowel movements.