Never skip a weigh-in. Never. It's a slippery slope.
My original leader (whom I still adore, so I quote her a lot) used to say "You skip one weigh-in so that you'll 'do better', and then do even worse than you might've done had you just come to weigh-in in the first place!" The purpose of the weigh-in isn't so that we always have to lose weight. It's so that we can stay
mindful of the process.
Okay. You gained weight last week. So what? I gained weight this week. You know what I've chosen to do? Stay on plan another week. Count my points, add in a few more veggies.
I can't control the scale, but I can make darn sure I stay on plan to the best of my ability.