S.
A.,
You've gotten some great responses, and I agree that the weight is nothing to worry about. Our pediatrician has been so worried about my oldest daughter's height (she's very short for her age - so is Mom and Dad, so go figure!), she wanted to send us to an endocrinologist for growth hormone! Sheesh! Can't we all just be ourselves and a little different, if that's the way we're made? (However, we did have a bone scan and blood work done to make sure everything was normal, and it was). And if she was abnormally small or short, we would consider growth hormone, after lots of research.
Anyway, I want to say very strongly that I hope you will consider finding another pediatrician. I have had that experience with a couple of them, and it is inexcusable to treat moms that way! They want us to think they know everything and we know nothing. Do not let this doctor treat you so disrespectfully! You are a good mom and you're doing the right thing. Trust YOUR instincts and not THEIR misguided advice! (and Google everything to get more information!!)
It is hard to find the right fit with a pediatrician, and it's worth continuing to switch until you find one that will treat you with dignity and respect. I had a very difficult time finding one who respected my judgment on immunizations - and truthfully, she doesn't RESPECT it, she just tolerates it. So, I encourage you to stand up for your right to be treated as an educated, loving, good parent, and find that doctor out there who will treat you as such. And be willing to consider a regular GP or DO - you don't have to take your child to a pediatrician, just because he's young. Other doctors are well qualified to treat him, too. Good luck!