33 weeks not gaining weight

I’ve gained 30 pounds so far, averaging one pound per week for most of my pregnancy, however for the last month or so I’ve barely gained? My belly was also always measuring 2 weeks ahead at my doctors appointments and now it looks like I’m growing at a slower rate. It’s starting to scare me that maybe she’s stopped gaining weight. Doctor says there is no concern but I can help but worry a bit. Any other mamas barely gain in the last few weeks of pregnancy?