Hi, is this down just below you belly button on the right, if so this could be your appendix, it may be a grumbling appendix, but just get to your doctor and let him give you the test.
Good Luck
Stop taking alcohol. drink plenty of water try to pee as much as you can to wash off your stomach. stop taking junks and all kind of soda drinks. Eat boiled vegetables and soup. No fry stuff.