My ds is 20 weeks old and will only nap for 45 mins at a time in his cot. I think 45 mins is enough for his morning nap as he wakes up wide awake (if that makes sense), but after his lunchtime and afternoon nap he wakes up grizzly and rubbing his eyes. I get him to sleep by putting some music on and holding his hands, but if I try and get him back to sleep after 45 mins he gets hysterical and nothing will get him back to sleep - even BF. It's so frustrating because I know hes still tired but he refuses to go back to sleep! Anyone got any advice?