Woah 1.7 OG, you throw the yeast into straight sugar!
Anyways, assuming you meant 1.070...Have you checked your Gravity? Very possible the beer is close to, if not, at final gravity. When you pitch the appropriate amount of healthy yeast, like it appears you have done, beers will reach final gravity in 3-5 days. It is recommended to leave the beer on the yeast for a while longer as it can still "clean" things up. What yeast did you use? Sounds like a high flocculating strain. And what temperature is it at?