I had an endoscopy a couple of years ago for an unrelated thing, nada, in the digestive area.
I’m serious too.
Read the links. Go to the doctor. Get the tests. Follow his advice.
Don’t pay any attention to the wise acre posters. Antacids are not the mainstay of ulcer therapy any longer. Neither is milk or anything to coat the stomach. You want your daughter to be treated with a combination of an antibiotic and a proton pump inhibitor. Your family doctor should be able to prescribe both for her. The antibiotic is for the H. pylori which, if untreated, will result in future RECURRENCES of the ulcer. The proton pump inhibitor is to suppress gastric acid secretion. This is all very mainstream medical care and should be available through your family physician (or hers). If he or she is uncomfortable approaching ulcer management in this way, your daughter should ask for a referral to a gastroenterologist or specialist in treating GI diseases.