Feeling sick everytime I eat

You know I did not think of that because I tried milk the first week I was out in a shake and I was gaggin a lot and feeling sick after I had it. I did not try milk again for awhile..until I got the CIB and then tried it again. However i do not feel like crap until the next day when I wake up. Every morning I gag when i wake up and I was doing that in the middle of the night at times before..but since I stopped drinking Milk I was not doing that and NOw I am doing it again and maybe it is the milk. IDK. I thought if you were lactose intolerant you would get the ****s and be really really sick. I just get nausous and gag.