My girlfriend actually bought a ww scale same thing happened it's not the same as when we weighed in. It was off a couple of pounds!
I try not to weigh myself until my meeting, I also started with measuring my thigh, waist,arm,hips. To see the difference on inches I lose,b/c my pants r way loser then before.
I sugguest to measure ur self cause even if u dont lose pounds you might lose inches! Good Luck