Hi..for A Few Days Now I Am Ssuffering Form A

Hi..for a few days now i am ssuffering form a stomach problem....past few weeks i had been eating out alot and also may have overeaten....as a result my stomach is creating problems...there is lot of ga s accumulation and I am not being able to eat as my stoamch always seems to be filled with gas from the throat down to the stomach....I am also feeling weak because of this problem..can you suggest me some medicine and some foods that I should take in order to cure this?