(Sorry for inarticulate post, I'm a bit sleep deprived).
I've been worrying that I'm feeding my dd (27 weeks) too much as well. She's always been exclusively bf, and I started BLW about two weeks ago - obviously not that much food going into her tummy yet.
She weighs about 9kg, and is in the 90th percentile. I've not been to the doctors with her for a couple of months, so don't have a professional opinion, but everyone (even strangers in the street) comments on how she's (delightfully) chubby, or even 'cute but fat'.
I keep hearing that you can't overfeed a bf baby, but not sure if this is true or not! I'm also co-sleeping, and wondering if dd drinks more during the night because it's 'on tap' next to her. However, it's been an incredibly hot and humid summer where we live in mainland Europe, so maybe she's been thirsty as much as hungry?
Do I need to worry? Do anything different? Or like other posters have said, just wait for her to balance out when she starts moving...
Having battled with my own weight (now an average size 12 and happy about it) all my life, and had an eating disorder, I'm really conscious of unhealthy body image, and of having my dd grow up relaxed, unselfconscious and as-much-as-possible unaffected by size pressures.
As queenofeyes said, is it possible that rational advice that adults and older children shouldn't be obese is filtering down to babies?