As you increase your activity (and that is a great thing), be careful. I have noticed that cardio doesn't really change my appetite, but lifting, especially lifting heavy, makes me ravenous. Because of that, I avoided lifting for a couple of years. As I have come to recognize that I needed to do strength work and had a problem, I had to change my eating habits. I prefer to lift in the evening. I used to have a snack around 4:30 and then eat between 5:30 and 6:00. I would get home from the gym around 8:00 and be starving. I have now pushed off my snack to after I lift.
Just be mindful of how changes in your behavior affect you and make changes to other aspects of your day.
Keep up the great work.