Yea she's always been 3rd percentile and has followed along the line. But I was giving her formula during night when she wouldn't feed. But I've tried to stop that now cos its not what i wanna do and I know she knows how to feed now where as initially we had lots of feeding issues. Plus I think the formulas been giving her a bad tummy ache( I'm not sure though).
I think sometimes we have to trust instincts rather than science. I still worry though!