I hate when that happens. Sometimes there is no justice. Keep plugging away and it will come off. That is what I have had to tell myself the past few weeks too.
All your hard work will pay off eventually, I promise. Sometimes it seems impossible, but it will. Also, that small amount of gain could be just water weight, and two days from now it will be gone.I know it's hard not to get discouraged, but trust the process.
Aww :( I'm sorry.It sucks when you've done the right thing and the scale decides to be mean anyway. As long as you keep going it'll have to come along eventually. Don't let it get to you and just keep going!
And when you've got a chance, I've got an award with your name on it over at my site.