Patience, grasshopper. 6 pounds in 10 days is plenty, most of it is likely water weight. Don't expect more than 2 lb./week, even that's pushing it. So, even making the rash assumption that your weight loss was all fat, you're a week and a half ahead of the curve already!
You could recalculate your block Rx, it likely hasn't changed. This is because the prescription is based on your lean body mass. If you lost 6 pounds and ~2% bodyfat, that should leave your LBM at about the same (or close enough that the blocks wouldn't change).
The body needs time to adjust the metabolism and become comfortable at each level...