My 4 1/2 month-old son has recently begun screaming during feedings. It doesn't happen all of the time and seems to be worse as the day goes on. He'll be fine for the first couple of minutes and then will come off and begin screaming and crying. Sometimes I can get him to start on the other side, but then the pattern repeats. I took him to the doctor and they couldn't find anything (ears are fine, etc.) Please help!