stomach problems

i am a 46 year old woman. i have always had asensitive stomach but in the last year or so more than before. i have no pain at all. i notice that if i eat certain foods i get gas symptoms and not just belching.i get a gas pressure feeling right below the breasts which sometimes becomes a band going around the back. again not pain, it just feels like gas pressure and i will have to rest a few hours til it subsides. this doesnt happen all the time just with some foods. i have notice that it happens with greasy foods or oily foods or rich, creamy foods or dressings and certain cheeses.it is not every oily food,for example pizza does not really upset my stomach unless itis very upset to begin with or if i eat too much of it. i have noticed it happens with a lot of takeout foods. obviously, i have to change my diet, i am just not sure exactly what to avoid. any suggestions or opinions would be much appreciated and i am very open to natural remedies far more than conventional remedies. thank you. Tweet