It's completely normal to be hungry after eating. The reason you're hungry is because your body is burning up it's fuel during exercise. It's important to replenish with protein/carbs within 45-60 minutes of exercise completion. A fruit smoothie w/ some vanilla protein powder is an easy way to do it, but no matter what, don't starve yourself.
It's also very important to eat something light before working out as well. Working out on an empty stomach is a terrible idea, but you also don't want to have the grand slam breakfast. Choose a complex carb/protein such as a piece of whole wheat bread with peanut butter and a sliced banana on top. Do this and drink a glass of water an hour ahead of your workout.
Doing both of these things will insure that your body is getting what it needs to keep healthy.
Hope this helps!