As per your history is concerned your symptoms are one of the cause of lactose intolerance so do like this- 1)Dietary adjustment is the primary form of therapy for patients with lactose intolerance. Try to reduce or restrict products containing lactose. Prehydrolyzed milk (LACTAID) is now available and is effective. Yogurt and fermented products, such as cheeses, are better tolerated than regular milk. Soy-based milk or food products are well tolerated. Commercially available lactase enzyme preparations (LACTAID, Lactrase) are effective in reducing symptoms ,however, they may not be effective in some patients, partially due to insufficient dosing. Supplemental calcium should also be recommended. In secondary lactase deficiency, treatment is directed at the underlying cause. Whole milk and chocolate milk may be better tolerated than skim milk. Any doubt let me know.(Thanks)