my 17mnth old son was born 14wks premature. from birth he has suffered with, and been diagnosed with severe GERD. recently, i would say the past 20 days, he has rapidly alternated between frequent loose stools, to constipation. theese changes can occur every few days, to as little as every few hours. in the past he has been tested for celiac, lactose intolerance, and wheat intolerance. he was clear for all of these, except the GERD.