Hi welcome to the health care magic This history suggest towards non infective functional bowel problem If alternate diarrhea and constipation present then it can be specific irritable bowel syndrome So for this problem anxiety management is to be done first Yoga, exercise will be beneficial Consult psychiatrist for anxiety issue if you are having that Consume more fiber foods in diet like fruits, whole grain, wheat bran etc... Drink more water daily If needed fiber supplement can be prescribed by your doctor Take care Hope your concern solved Consult gastroenterologist for examination and colonoscopy if needed