Calorie Restrictions?

McKenzie • Pregnant with #1! Due July 5th, 2015!
Has anyone been put on calorie restrictions late into pregnancy? I don't have gestational diabetes and have gained 19 lbs. I'm currently 278 at 34 weeks. I went to a nutrition clinic and they told me to shoot for 2000 calories a day. Then I went to my doc and she reduced it to 1600-1800/day. I'm trying really hard, but it's been really difficult. Do you guys have any tricks?