If you can get it, it's over the counter here, get some Lactaid. I'm serious. It's just the enzyme that your digestive system is missing that breaks down the protein lactase. Which is what most likely causes you the discomfort. It works.
"It is not length of life, but depth of life." ~ Ralph Waldo Emerson
You know what would be awesome? If there were such an OTC product to counter my caffeine-intolerance. So I could take that and Lactaid (for my lactose intolerance. Am I really only 24?) and enjoy a giant, steaming mug of Chai again.