Houston we have a problem

Okay. I'm gaining too much weight. My doctor is being nice about it, much nicer than my previous OBs during pregnancy. I'm not fat I didn't start off fat but slightly overweight. I'm 5'6 and started off at 162lbs (size 8). I'm very curvy and started off thicker. I'm 28 wks and have officially gained 30lbs so far. According to online weight charts I've already exceeded the amount I should gain. I drink lots of water, no swelling, and just got GD test-waiting on result. I do eat healthy but have been snacking too much lately and my appetite has increased tremendously in the past 6 wks. How can I avoid not gaining more than 10lbs in the next 11wks??????