Baby is 4 months. Been going through the regression for about 3 weeks. Previously fell asleep on her own and had 3 2/3 hour naps per day. Now I have to put dummy in about 10 times and rock her cot to get her to sleep. This works until she wakes 45 minutes later after one sleep cycle and nothing gets her back to sleep. She is having about 4 naps like this a day. Is constantly grumpy and I'm finding it difficult to give any attention to my toddler as I'm constantly trying to get her to sleep which takes ages. She is miserable. She isn't overly fussed by the dummy, it doesn't get her to sleep but does comfort her so we are preserving. Any advice? DC1 was easy with sleep.