^^^^^^^
What they said. Examine your calories.
It's tough. In my first 8 months of weight loss, I was able to manage calories very easily, but I was only doing 4-5 hours of exercise each week. 4 months ago I started biking 10-20 hours a week, and I lost control of my appetite and started eating a LOT more than I used to, simply because my body was screaming for it and I lacked the willpower to say no. I'm currently reexamining what I eat going through it all calorie by calorie again. Sometimes that's what it takes.