Had Salad With Cold Black Beans On It On Saturday

had salad with cold black beans on it on saturday afternoon. hour later doubled over with burning in stomach and pain. ran to bathroom. not diarrhea. happened little bit next day. eating bland for three days. tried a grilled chicken salad today and peanuts. repeated burning and bathroom. not diarreah. but stool tan with some undigested veggies? pain across lower abdominal area. pain gone after bathroom.