Weight Gain

I'm exactly 25 weeks today and I've gained 11 pounds so far. I feel like I'm gaining too fast.. My Dr said he recommends I gain 1-3lbs a month (from 23 weeks & on) I gained 3 pounds in just 2 weeks. Anyone out there around 25 weeks, how much weight have you gained? How much weight gain did your dr recommend per month? 
Left picture: 22 weeks 
Right picture: 24 weeks