Stuck on same number

There are some really good posts stuck to the top of each forum section in the "must reads" posts. This one in particular might be useful: http://community.myfitnesspal.com/en/discussion/10084670/it-is-unlikely-that-you-will-lose-weight-consistently-i-e-weight-loss-is-not-linear/p1

My weight is up and down most weeks. I have pledged to only weigh myself once a week.

fluctuations are perfectly normal....but you should be seeing a downward trend overall over a period of weeks. If not you need to check you are being accurate enough with your food logging as you may be eating more than you think.