Weight gain?..

Amber • Mommy to be, and the father of my child is amazing!💜
So since I've gotten pregnant I've gained maybe a total of 45 pounds so far and I'm 30 weeks. I'm a fairly small person, so my doctor keeps telling me I'm over eating and the baby is to big for how far I am?? I thought as long as the baby is healthy I'd be fine. So what exactly are they getting at?? Bc I can't just stop eating when I get hungry!!??? And apparently I keep measuring ahead so they keep uping my due date ...?? Any advice ?