C'mon Sue, this isn't like you, you sound so negative at the moment. A pound gain isn't the end of the world, not when you compare how well you've done so far. Do you know why you gained or is it one of those really annoying undeserved gains? Don't let a little setback deter you from your goal, you know what you want and you know how to get to it, so chin up, positive vibes coming your way, and get those recipe books back out to find some great stuff to make this week to get you back on track.
Good luck chick.