Hi thanks for contacting health care magic ... You are having irritable bowel syndrome since three year.... In this condition (which is one of the functional disorder) dieatary habit has to be changed .... Take more fiber foods like apple, spinch, whole grain , wheat bran like supplementation.... Fiber supplement tablet also can be given .... Isapghula husk in milk taken daily will be useful in IBS induced constipation... Drink more water ... In IBS main solution is to avoid stress as it can aggravate the condition.... In recent senerio , specific drug for IBS is available like lubiprostone .. Fruits and green leafy veg eaten more .. Take care .. Hope your concern solved ...