That probably has nothing to do with the chicken, unless it's gone bad. Although, chicken's probably not the best thing to be eating at every meal for five days straight. I'd try rotating between some other proteins.
I've honestly never heard of such a thing as meat intolerance, aside from ex-vegetarians / vegans who need to adjust to it again. It seems like you would need to have an extremely damaged gut to not be able to digest plain old meat.