Hello there, I am Dr Asanghanwa Carlson, from your description I would say you might have an issue of food poisoning which might be due to eating poorly conserved food in the previous days. I would recommend you take some spasmolytic drug like Spasfon tabs: one tablet thrice daily for about five days, drink lots of water respect basic hygienic measures like: keeping and serving food in clean utensils, washing your hands with soap and water and washing vegetables and fruits in clean water before eating them. If It persists, I would advise you consult your physician. Good luck