Hormones can do this. For me, I am a bottomless pit a week before my period. I'm always amazed that I don't gain weight because I pack in the calories. But then it magically just stops.

Are you on any new meds? Some meds make you feel like that too.

I remember years ago when I started on birth control pills, I could eat and eat and not feel full. So I know that hormones play a roll.

I remember Oprah talking about Oolong (sp?) tea helping with that "can't feel full feeling". I think it ups your metabolism or something.