I usually have to go poop a little bit after I drink milk. Am I lactose intollerant?

That sound like classic signs of it t

If you are lactose intolerant, you would feel very gassy and bloated and probably stomach pains several hours after eating/drinking dairy products. Since there is a time delay and no real test for it, the only way to be sure would be to go a week without dairy (which can be very difficult depending on your current diet) to find out. It doesn't sound like you are though, maybe you just have a very high metabolism.

Possibly, but i doubt the milk would move through your system this fast. Most likely you would have some gas or bloating first, then soft stools hours later. Try using lactaid or drinking lactose free milk and see if that helps.

mildly lactose intolerant u can try HL milk, low in lactose for daily milk supply the lactose free milk (usually for babies) is kinda expensive :D