Whey allergy? Or Lactose intolerant?

So..side note. Been trying to figure out what is going on with my body.

So I know I can't do protein bars, shakes, or powders. I immediately feel a tingling/itching in my throat. One time, I ate half a protein bar of Chris's and spent an hour in pain, nursing the intense chest-tightness that ensued.  I figured it was probably a whey protein allergy.

So, then I decided to dig a little deeper. As a kid, I LOVED mac and cheese and ate it quite frequently. Every time I did this, though, I experienced a discomfort in my chest, what I used to call "heart burn". I used to think it was because I devoured that mac and cheese so fast, but now it's starting to all seem so clear. I get discomfort from most milk products. I love icecream, cheese and most other dairy, but it makes me feel funny and generally gives me the shits (sorry).

Now...the internet tells me that an allergy is different than intolerance.  An allergy attacks your immune system and could potentially be deadly, while an intolerance makes digestion difficult and uncomfortable. 

So what I'm thinking is that I have an allergy to whey, but an intolerance to milk products (except yogurt, I love yogurt, thanks to the pro biotic cultures)

I found this: "Whey protein is found in lactose-based dairy products, such as cow’s or goat’s milk, cheese, sour cream, ice cream, and yogurt. Whey products are often high in lactose, and most products with whey will cause considerable discomfort for the typical person suffering from lactose intolerance." source

So starting today, I am going to eliminate milk products.