6mo DS is a happy little boy and goes down easily each night between 6.30-7. He will then sleep for anything between 30mins and one hour before waking. This pattern repeats until he knocks himself out with exhaustion about 11pm. Will then wake two or three times before morning. About a month ago we could leave him on waking and he would settle back down to sleep again himself but he seems to have list the ability to do this. Does anyone have any helpful advice or suggestions? It's driving DH and I insane and we rarely have an evening together. Thanks