Have you met your CWPC yet? If so, what plan are you doing?
By rights, you should only do SS if you have 14 pounds to lose before you reach a BMI of 25. By my rough and ready calculations, I think you only need to lose 4 pounds to reach a BMI of 25.
But you'll still be able to do 810. As tinkerbellsmum said, you might lose up to 7 pounds during your first week but it probably won't be much more than that because you don't have loads to lose.