Weighing yourself is hard, some do it everyday and others throw it out. I personally weight myself every week. As much as weight shouldn't be important it really is. It makes sure your staying on track, and the scale will hold you accountable. With weighing yourself you should do it in the same outfit every time. Once you are no longer able to wear it find another and weigh yourself in the 1st out fit then the new one and see what the difference is, sometimes there will me a small difference in weight.
If you are someone who weight themselves everyday.. STOP you will rive yourself insane doing it. Weight fluctuates through out the day. Weight yourself 1st thing in the morning after you go potty. Some days you might weigh a pound more because you may still have food in your digestive track. Don't stress about your weight. Weigh yourself 1 time a week or every other week! This will also help with your stress levels.
If you gain a little bit of weight go back and review what you did and see where you might have slipped. DON'T EVER GIVE UP!
NO MATTER WHAT