should I be worried

At nap time today I thought I heard the pitter patter of small feet when I should be hearing nothing at all.  So I go to the top of the stairs and hear a voice coming out of Master's room.  I go in and see the bathroom door is open (yes, he has a bathroom in his room).  I go in and shut it and he says to me, "Jess, sometimes I need to talk to myself to go to sleep."