Started my fitness Pal about a month ago, I've used it before successfully.
Have stuck to it religiously, weighing everything.
Started at 10 stone 5, wanted to lose half a stone.
I also run 5-10k three times a week.
First two weeks I lost five pounds.
I've now started gaining it back and am back up to 10 stone 3. Why? I'm still calorie counting like mad. What's going on?