Sleepless nights

We learned a new term today- "four month sleep regression". We found this term because I was looking up reasons why our normally good sleeping girl was now waking up every 45 minutes all night long. This is our new pattern of 6 days and I have to say, it is getting tiring for us all. They say it is because of a big jump in cognitive development at this age and we can see it in the new activities and alertness we can see in her. We went to the doctor yesterday to make sure it was not an ear infection or teething and she received a clean bill of health. I'm confident one of these days sleep will return to our household and until then what gets me through the day is that first thing in the morning when she's finally up for the day she gives the most beautiful big smile, completely unaffected by the evenings events and that smile, makes it all worth it.