I've figured out ways to drink or eat dairy without getting sick. Regular milk tears me up but chocolate milk doesn't. If I have a glass of milk with breakfast I have to finish my milk before I finish my meal. As for cheese, the longer its aged the less lactose it has in it. I can't drink milk even the day before it goes bad or ill be sick. A milkshake will give me gas for 2 days but a scoop of ice cream with my cake is fine. There's ways to get around it. It just takes a while to figure them all out.