Weight Gain

Has anyone else stopped gaining weight? I havent gained or lost any weight in 7 weeks.... baby is growing and healthy doctor says.. but I just worry because I feel like I should be gaining weight. Ive gained plenty up through the 2nd trimester like close to 30lbs but now I stopped. I mean thats great... but just want to make sure baby is safe and getting everything she needs. Shes in the 30th percentile so shes on the smaller side but nothing to worry about they said. Anyone else stop gaining?