My baby is 5 and half month old. His sleep lately is sooo bad he literally wakes up every 30mond to an hour. After speaking to health visitor this morning she's as advised to start teaching him to self sooth by placing him in his cot and sitting next to him and patting him and rubbing him to let him know I'm there. If he cries pick him back up but don't let him go to sleep in my arms. Has anyone else tried this and did it work?