I am coming around to the end of my second trimester, and I am starting to be concerned about my weight gain. At my last doctor's appointment at 20 (22) weeks, I weighed 104.5 pounds, a total of 12.5 pounds weight gain since the start (and as far as I can tell, it's all in the belly). My entire life, I have eaten what I want, when I want, and have continued to do so freely during my pregnancy. As well, I have never been very active, never exercise, never diet, and never gain extra weight, and I am 26 years old. Some people say I'm lucky, but here is the problem. I am pregnant now, and know there will be weight to be lost after the pregnancy, but I am lacking the motivation and willpower to exercise and not always reach for chocolate or fry everything in yummy butter. I don't know how to live a "healthy" lifestyle that includes forcing myself to exercise and diet. How am I supposed to completely change my lifestyle after all this time, or should I even bother when my body is already used to it and works well this way? I am quite concerned about this.