we went thru thr same thing at 6 months. I was told it is a massive developmental period for them. The hardest thing was HUnter's sleep pattern changed completely from being very routine to all over the place. Try not to get into the habit of patting them to sleep if its not something you dont want to continue. We had the problem where he would not self settle and had to re-educate him (which was hard as it involved a bit of crying). My best advice (which is what I was given) is to go with the flow - if they are tired put them to sleep, if they are not and want to be up more than normal - just let them if they are happy and dont stress about their sleeping. They get back into a routine after a few weeks. Good luck