@skylarfox
I don't know if you have a doctor that you have been seeing for a long time or not. But if I were you I would try to find someone that you really like and who listens to you (most likely it will end up being a female doctor although I have a few male doctors I do like). I have a doctor that I have had for over 30 years and just keep hoping she does not retire as a lot of mine seem to be doing now. But she has run some tests on me because of things I might be worried about that she thinks are highly unlikely (just to put my mind at ease). So if you are concerned, then by all means you should inquire. I think that someone who is well-versed in women's health and/or a nutritionist might be more open to your inquiries. So many people have to be told to lose weight and so your doctor is much more familiar with that problem and that is probably why many providers act like they do. They should however be focusing on your concerns and not just responding based upon the fact that the general population is overweight. I know that many young mothers keep their weight off by chasing after their little ones and so that is very common. But sounds like you have a very healthy lifestyle. I would check around where you live for some really good nutritionists and see even if there is someone who knows about the type of issue you are having although that is not essential if they are good. And while you are young, find some doctors you really connect with and that you feel are listening to you. I didn't ask before but are any of your other family members on the slim side, the heavy side, etc? Just something to think about as if your genetic make-up is that of a slim person anyway and then you are burning calories chasing those kiddos, this could account for your particular situation.
Best of luck to you.