pigging out

I may not be able to see the weight loss but my body knows.
this is what i used to eat at work
three tacos, 1 small quesidia, bag of chips, small pop
today i tried to eat the same meal, but this is what i ate
2 tacos,1 quesidia,less then half a bag of chips and water
and the whole rest of the night i was sick from eatting that amount of food.

So my body cant take in as much as it used to which is good. but now im sick. And i think that my lactose intolerance is getting worse.