Exercise and metabolism

Hey all,
Just wondering if anyone else has experienced this...I'm a young adult who exercises moderately hard (cardio) for about a half hour right when I get up in the mornings. I've found that I get ravenously hungry in the evenings if I exercise. I don't put on much weight, but I'll eat back 2-3x my exercise calories! And I'll sometimes still be "hungry" after eating all that...I just can't eat as much as I feel like I need. I'm also an ex-anorexic (I've been weight-recovered for about 8 months now, not restricting or anything :)) if that affects anything. Thoughts?
Thanks!!!