DD is 3 months old and settles really well during the day and overnight however bedtime is becoming exhausting. She settles to start with, goes into her bassinet and sleeps for about 5 - 10 mins (just long enough for DP and myself to start to relax) then she wakes and is hard to settle. This can go on for 30 mins to an hour and a half before she finally stays asleep. I'd say she somewhat self settles - she goes down drowsy but awake and drifts off pretty easily. She averages 1 to 1.5 hours awake time during the day and we stick to this at bedtime so as not to get overtired but it doesn't seem to work. We also have a 8 year old and 3 year old. Any suggestions what we can do to help her stay asleep in the early evening?