Calorie question????

I'm trying to lose at least 5 pounds by the fourth of july so I've been being really active and eating better for the last few days. I think I burnt off 200 more calories than I took in today, and I wasn't starving myself I ate three nutritious meals with two snacks. I didn't stop moving all day and it was really fun, but I was wondering if I do this everyday from now on (burning 200 more calories than I'm taking in) will I lose the weight or just stay the same? I know that to lose a pound you have to burn roughly 3,500 calories, is the way I'm doing this healthy, should I take a more cautious approach, or eat more or what. Will I lose any weight at all? should I be more active?