What could cause my 3 month old to be fussy ever waking hour of his life? I'm going out if my mind! His reflux is under control. I just don't get it!

Several Possibilitie. There may be a number of possible causes.Formula intolerance and uncontolled acid reflux are common causes. An unseen medical problem such as volvulous or malrotation may be present. These are blockages of the intestine which can be serious!discuss with your pediatrician.