I think I'm Lactose Intolerant.

Well yesterday I had an issue with having some milk. I drank a protein shake and started feeling like major crap. 20 minutes later I then spend the next 15-20 minutes in the bathroom crapping my brains out. So now I'm gonna have to look into other ways of finding out if I am in fact Lactose Intolerant or not. To help me prevent future issue like this one from happening. Cause believe me I DO NOT want to go thru that ever again. So that's newest goal for me. wish me luck..