Working out, eating more

You are actually supposed to consume more calories when you work out. Otherwise, your body thinks you're starving it and holds on for dear life to those calories you do eat, which means you don't lose any weight. They say you're supposed to eat all the calories you burn, but many people only eat half of them back. That way it accounts for any error in calories burned estimations and gives you a bigger deficit without starving yourself.
Hope that helps!

Your body needs to refuel after a workout. So I wouldn't try to curb the appetite, I don't think you'd have much success with that anyway. Instead, I would try to plan your day so that you have a planned snack or meal directly after your workout time. Or alternately, even if you add an additional planned snack in on workout days you should be ok. If you plan for a snack of about 100-150 cals (I would suggest something high in protein for muscle recovery) and you are burning 500-700 cals you should still be in really great shape and you'll be keeping that metabolism burning.