For ladies who have gone through a pregnancy with hyperemesis gravidarum, was your OB ever concerned with lack of weight gain?

I'm 34 weeks and weigh the same as I did at conception. I've had some weight fluctuation in there with losing weight from bad weeks/months and then gaining on good weeks but overall haven't gained any. At my last checkup she mentioned that I hadn't gained any weight over the last month and that this is the point where a half pound weight gain a week is typical. She doesn't seem concerned about the growth of the baby.

Just wondering what you all experienced/if your Drs were concerned.