Hi there,
It certainly sounds like you are lactose intolerant, which millions of people are and which you can easily read up on online. I have a suggestion for an inexpensive way to test whether you are lactose intolerant: Avoid ALL dairy (milk based) food for 4-6 days then have one glass of milk. Hint: Stay close to the bathroom! If you have any kind of reaction which you did NOT experience during the days you were 100% off dairy products you will know your problem!
If you do eventually stay away from milk based food as part of your lifestyle at some point try either a small amount of yogurt or frozen yogurt "icecream" as yogurt based dairy food presents far fewer problems for us lactose intolerant folks. I'm thoroughly lactose intolerant yet I can have a half scoop of frozen yogurt (when my friends are diving into their icecream cones) and I have no problems! Check out Ben & Jerry's frozen yogurt. Very few lactose intolerant people are aware they can consume moderate amounts of yogurt, which is a great source of calcium and digestive enzymes for our gut...
Good luck!
Michael
Yup...I like to tease that I am NOT Lactose Intolorant...I am Lactose NO FREAKIN WAY! lol
Example: I was recently pouring a glass of chocolate milk for one of my daycare kids and nearly overflowed the glass. Without even THINKING I quickly leaned down and took a sip off the top to prevent the river of milk from hitting the counter...10 minutes later I was laying on the bathroom floor in a ball crying my eyes out in pain. I get the same reaction from icecream, sourcream (anything with the word CREAM) and from certain cheeses.
Not fun...