Am i lactose intollerant?

i went to the allergist to get tested for things ive been reacting to and milk was one of them, i get very sick and puke or get a stomach ache depending on how much i ate of milk products. they said that i wasnt allergic but just might be lactose intollerant so i tried using lactates (2 per meal) and i still get sick..what the hell is wrong with me bc ive been like this since april and its torture!! and why the heck would it just pop up outta nowhere?