The trouble comes when other people - mostly grandparents and other family members, on both sides - make me question it all. When I can see she's on the cusp of needing sleep, they want to carry on playing, when I know she's grizzling because she's not had enough sleep they tell me she's hungry or - both grandmas favourite - it's her tummy/wind. And because they've all been there before I do listen to them.
But then I'm proved right when we get into the overtired vicious circle. Yet I'm still made to feel like I'm obsessing over her getting enough sleep. But it is really important.
On a brighter note - and an example of the effect a good sleep can have - Charlotte was an unbelievable angel at her second Welcome to the World BBQ. This time it was for her Northern family and friends. We'd made sure she had a good hour and a half's sleep at lunchtime. And for the rest of the afternoon we had smiles, happy noises, another kip, good feeds and not a whimper.
Even her bath and pre-bed massage were perfect. As I'm writing this I have just put her down to sleep. Unfortunately the party is still very noisily going on, and Charlotte's wide awake, so we'll see how long it takes her to nod off...
edit: Ok, so she settled herself to sleep beautifully within 20 minutes, despite the cocophony of noise... and then slept for a personal best SEVEN hours before waking for a feed. I was obviously awake several times before that worrying why she hadn't woken as usual. Let's hope this isn't a one off, and she continues to be an angel child.
edit2: but then it took more than an hour to get her back to sleep:(