What does any one suggest to do, my 2 month old, who used to nap like a dream, actually would start up the stairs himself around nap time, who took 2-3 hour naps daily without fuss..is now suddenly getting up and running all around the upstairs..and in his room, putting books on the shelf, rearranging his toys etc...this has also coincided with waking up at night which he also has never done. I put him back in the bed each time resettle him and so on, then about 5 minutes after I leave I can hear him running all around again. I am not engaging him in any conversation, but this goes on for an hour or more. what am I doing wrong??