What's going to happen to me if I'm lactose intolerant and I ate an entire tub of vanilla ice-cream?
it depends on how bad ya got it. Some people get hives and have huge reactions, while others only get a head or stomach ache. It all just depends on the person.
You'll be sick.
If you didn't take a lactaid pill, you're probably going to have some GI distress, like bloating, gas, and/or diarrhea.
your are going to be really sick head to the bathroom you are going to be there a while and while your in there think about what you did