We made a special Saturday sick appointment to have my son's ears checked because I was SURE that a raging ear infection was the cause of his waking every hour each night (after sleeping through the night for weeks and weeks and weeks). Yep, no ear infection, just a poor sleeper...
http://www.pregnantchicken.com/pregnant-chicken-blog/2011/10/20/medical-visits-get-used-to-feeling-like-an-ass.html