My 4mo is a terrible sleeper anyway, waking up every 2 hours, sometimes less. But she seems to of hit the lovely 4 month sleep regression where I'm lucky if she sleeps for a solid hour!
She is bf so I deal with most of the night wakes (until around 5am/6am when DH takes over if baby is not hungry). We have already established a good bed time routine where she knows it's bed time and settles really quick, but that is her settling with me cuddling/rocking her and waiting until she is in a deep sleep before putting her down. I know this is where the problem is but she cries if she's put down awake.
I'm obviously very exhausted so I think now is a good time to try sleep training. Does anyone have any tips for how's best to do this?