Hi
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This could be due to food poisoning, gastroenteritis with gastric reflux, infection like amoebiasis or giardiasis. Take an OTC lactobacillus preparation and yoghurt with your meals. Drink plenty of fluids (clear soups, water, ORS in water, lemonade). Eat light, do not stay hungry but eat simple things like toast, porridge, cereals, crackers, banana, rice, peeled apple, etc. Take ORS. Take over the counter antacid and antiemetic (this SOS for vomiting). Watch out for a day or two with this treatment.
If it does not help consult a doctor to rule out other causes like infection, food intolerance, IBS etc.
Take care!
is the pain just below or on your lower right rib cage? does it feel like the pain wraps around to your back or like it's straight through from front to back all around the lower right rib cage? If so It may be your gall bladder. You might have gall stones. If the pain is there and it goes away after a while you may have passed a gall stone. If the pain starts agin it's another one. But if the pain starts and doesnt stop and after a day your skin starts to jaundice(tinge yello) you may have a gallstone blocking and you'd need to go to the emergency room.. Hope this helps