Hungry much!?!?

I don't know what is going on with me but I am STARVING by 9:00am. I started going back to the gym this week so that might be the case but my workouts aren't strenous but HECK FIRE...I am so hungry. Already today I have had an apple, a Kashi bar, and a whole box of Macarroni and Cheese. I don't know what is up...Oh well. I am not hungry in the evening so I guess I get all my calories before noon! Ha ha ha!