Just teke those medicines as you doctor said. Stomach ulcers can have very serious complication including perforation and bleeding. Those medicines are used to reduce acid secretion which is the main factor for supporting ulcer formation. Blood vomiting is a sign of complicated ulcer and it shoud be aggressively treated not only by drugs,also by endoscopic intervention (ligation, sclerosation, laser). If nothing helps surgical procedure can be performed. Until that you should change your lifestyle and dietary habit. This means you need to avoid coffee, alcohol, fats, fast food, smoking and stress. Also you mustnt take nonsteroid analgetics. Wish you good health, Dr. Ivan Romic (Rominho)