Burning the midnight oil?

I took Devon to the Dr on Wednesday because I was up all night the night before.  Devon would wake up crying and acted like he was in pain, and pulling at his ears.  Because he just got over an ear infection, I thought that he had another one.  Well, as it turns out Devon's near crawling is most likely the culprit. His ears, nose, throat, etc look great.  Yes, he is getting another tooth, but most likely that isn't keeping him up.  Dr Wichman confirmed what most of us moms knew already.  When these little guys are working toward a milestone, they wake up and practice...then can't figure out how to get back to sleep, or calm down enough to sleep.  So apparently Devon was too busy trying to crawl in his bed, that he couldn't sleep.  What to do?  Let him cry until he goes to sleep.  I'll tell ya how that turns out.