My 3.5+ year old is seemingly stuck. Every afternoon when I put him down for his nap he nervously asks "you gonna be here when I wake up?" OVER AND OVER. It does not matter what I answer or how I answer. I am halfway through a "yes" or "of course I am!" and he is saying it again. He must say it 5-15 times! He repeats this again at bedtime "You be here when I wake up?" at times near tears, full of concern, and ignoring my answer just repeating it over and over. He will even bring it up when we are driving to preschool-"you be here after my nap? You be here when I wake up? You be here a lot of times?" I don't know how to help him, I don't know how to answer him any longer. And I am both concerned about him as well as frustrated having to repeat this same scenario every night. Any thoughts, advice? Is this normal or should I be concerned?