I know you don't want to hear it, but if your car had anywhere between 60K miles and 100K miles, that is prime time for brake master cylinder failure. The fluid will be high and no leak, as it is an internal leak. It usually showns signs just after a nice brake fuid bleed job since you now have all clean fuid and no dirt is there to help minimize the leak. Anyway, I would be happy if it really were my brake master cylinder as that is an easy fix. ALL brake master cylinders on todays cars will go out eventually.