Weight Gain

So ladies I need some input on weight gain. I'm stressing a lot bc I feel like I've gained ton of weight. My doctor hasn't said anything to me but I feel it has packed on pretty quickly. I'm 21 weeks and gained closed to 25 pounds. A lot that had to do that I quit smoking As soon as I found out I was pregnant so I definitely picked up eating in place of smoking. Any other mommies gained a lot in the beginning but didn't gain much towards the end? Thanks ladies