hawthers Edward might be piling it on, but my older son didn't. He flatlined for months. Even using the acetate overlay charts he was drifting down the centiles. We were doing weekly weigh-ins and it was truly disheartening. However he was healthy. He was the right colour, alert, producing obnoxious substances in sensible (at times epic) amounts and was generally well. My health visitor hammered on about formula. She was determined it would solve his problems. Despite my history of depression, and the issues I had with inadequacy and failure she pushed and pushed. I caved and mix fed for a whole and it made no difference whatsoever. He was just small, with minimal weight gains, for a while. I went through the GP who referred us to the dietician t the hospital, nd she was the best person I spoke to. She actually looked at him. Not just a graph and the numbers. She looked at my baby nd spoke bout his habits. She want concerned, so I stopped going to weigh-ins and went with instinct as she advises.
He eventually 'clicked' and started gaining at a decent rate, but at that point he was weaning so we have no idea what to put the 'click' down to. He is fine though. Perfectly average size and attitude for his age.
What I'm trying to say, in a rambly four thirty stylee, is that sometimes it isn't an issue if they don't grow for a bit. If you're happy to continue breast feeding, and little one is well and healthy in all other ways, just turn off and concentrate on yourself and him. If you want to talk to someone, ask for a referral to the peadiatric dietician. I have very little fifth in health visitors, and GPs are often hobbled by their G, so go for the guys who deal with it day in an out.