This does not sound like colic which, as you probably know, is not related to health conditions (including digestive problems). A sensible course to continue to pursue is something in the broad area of gastrointestinal problem. Now, it is possible that an intestinal flareup associated with the dairy products might persist for a time, even with discontinuation of the products. In other words, an immediate cessation of the problem might not be expected to occur. This definitely has the appearance of a health-related cause, not colic.