Rapid Weight Gain

Jolene • 2nd x Mommy. Army Wife. Future MSW.
So I lost 20lbs my first 14 weeks and I only gained back 3 pounds until I hit week 29 (last week) since then I feel like I have been gaining a pound a day! Any tips on how to keep my weight gain down??? At this rate im gonna be wayyyyy past my pre preg weight by time Dec hits. I gained 40lbs with my first son but I do not want to go down that road again AT ALL!