Thanks for contacting healthcare magic. According to your complain you have problem of gas and diarrhea that may be because gastroenteritis problem. Irritable bowel syndrom may cause this type of symptoms. In irritable bowel syndrom change a stool consistently and frequency both. Proper history and investigation helpful for diagnosis. Stress and anxiety may affect a digestive system. Abdominal ultra sonography is helpful for further diagnosis. Stool examination test is helpful for further diagnosis. Consent a gastroenterologist for proper diagnosis. I hope my guidance is helpful to you. Take care. Thanks.