Definitely keep logging and tracking food and calories. this has helped me tremendously with keeping on track (sure I still go over sometimes and the first trimester was tough because all I wanted was carbs and no veggies), but I still tracked. I am 16.5 weeks and gained about 7lbs which is actually a bit low for my weight (normal weight for my height) but I'm sticking with what I am doing for now because I give into cravings on the weekends. I eat well throughout the week and give in on weekends, and we also have several weekends away coming up and I want to get through them and then I may up my calories a bit. But if I am hungry one day I won't go to bed hungry just to stay under, I will eat something good to fill me up. I am set at maintenance and eat most of my exercise calories back (usually all of them).