I just learned during a family vacation that I'm (probably) lactose intolerant. Keep in mind I slowly started changing my diet to less junk and more veggiea, fruit and low calorie dishes as opposed to tons of junk. So i thought it was the change in diet finally catching up to me and/or PMS. However the other day my brother was teasing my parents about how they were negligent because he didn't know he was lactose intolerant until he was well into adulthood. As he was describing his symptoms I was like "wait, i've been feeling those lately too!" So i didn't drink any milk all week and I've been fine. I drank half a cup of milk last night and within 30 minutes, I was having stomach cramps and gas. I also saw a difference in my stool (for the worse ) this morning Oddly enough I don't seem to have this issue with cheese or when I put milk in my coffee. Same with ice cream. I guess the other ingredients kind of buffer the milk product.