Amanda,
There are a few non- invasive tests to see if you're lactose
intolerant (LI). Do some cheeses and milk bother you more than others
(soft cheese worse than hard cheese)? There's also a breath test.
(see link below)
Much of the world's population is lactose intolerant, or lose their
tolerance to lactose as they get older.
I also have dark eye circles and stuffy nose after having milk and
cheese products, so I have researched some of the info. Start at the
site below, and browse around. Steve Carper has had this site going
for at least the last 10 years, and it's very complete.
http://ourworld.compuserve.com/homepages/stevecarper/QUESTION.htm