My 5 month old was just waking once between 5.30am and 6.30am. He has recently started sleeping in his own room and after 2 good nights, when he slept until 7.30am, he is now waking 3 times a night. We've slipped back into using a dummy to get him back off to sleep and he feeds on the 3rd time of waking. We also feed him around 11pm to help him through the night. Any ideas?