I reckon next week you will be -2lb plus more Suey, any number of reasons can cause a gain, stress being one of them, water retention another, time of the month another. If you are due on that can cause you to pile LBs on. Dont worry about it. Look at the bigger picture and long term. This WILL work. Try starting a food diary if you havent already, you may not be eating enough, or you may be eating syns without realising it. It takes a good few weeks to get your head round the plan, so dont be disheartened by this particular weigh in, just write it off and move forward.
I would be very grateful if you could copy and paste this back to me at about 9pm tonight when I am crying kthnksbai!