I have a 3 year old son who was born two and a half months premature. He has always had a very extended stomach and for the first 2 years he suffered from constant constipation and had to be on miralax and had to be given medicines to help him with hard bowel movements. Now for the past year he has went completely the other way and has nothing but watery stools and his stomach seems to be getting even more extended. He passes alot of gas and and is almost impossible to potty train because he has watery bowel movements more than ten times a day. I have taken him to the doctor and and he was put on a probiotic, had bloodwork and xrays done and is now being sent to a specialist. What could the cause be and the likelihood that its something serious?