A.H.
You may have an overactive letdown. If so, your son may get filled up too soon and never get to the hind milk, which can cause colic symptoms. Make sure that you have him completely empty one breast at a time while feeding. Maybe even only offer 1 breast per feeding. Baby massage is a help as well. Parents magazine makes a mommy/baby exercise dvd that's at target with a segment on there geared towards good digestion. Those are the only tips I know. Good luck!