Hi first time mummy. I was also repeatedly told the same thing. In fact when I was 12 days overdue, people didn't believe that I was about to have the baby.

My midwife even told me that based on my measurements, I was going to have a small baby and he came out at 4kg. I wouldn't worry too much about what people are saying. Hopefully if you don't get too big it will be easier to lose the weight later?

You should be fine if you rely on the ultrasounds etc.