Here's a tip for others - you can buy Lactase pills at a pharmacy and take them just before you eat any meal that contains milk. This gives you the enzymes you need without your body producing in it.

And it's really awesome. I only started doing this a year ago, but now I can eat many more cheeses, drink milkshakes, etc., without feeling bad. And it happens surprisingly often - every time you want to eat pizza, pastas, etc.

Seriously, is you're lactose intolerant, give it a try - it improved my life considerably.