DS is 2 1/2 and started having tummy ache about 3pm. Done 3 normal poos but it's now 3 1/2 hours later and he's still crying a lot saying it hurts. He'll stop if he gets distracted by something like tv or reading a book but then starts up again crying and saying oww. I thought tummy ache only lasted an hour or two? He's never really had one before just been sick once or twice.