E.S.
Ditto on what Susan said. I don't remember exactly what age my son went through that, but I started giving him a little warm milk in the morning and quickly/quietly changing his diaper all while keeping his room dark and it helped him settle down and he would (usually) sleep another hour or so. I figured he was going through a growth spurt and needed some extra calories to make it a little longer. Pretty soon he just started sleeping through again.