Do not ask me why 13 days and not 10. The real question is not what the right amount of days are; the real question is what you will do with your remaining days.
The reality is that you will not know how many you have left until your final hour strikes. And the most beautiful of all is that you have the power to do whatever you like.
In essence everything comes down to this; are you able to move forward inspite of your fears, or are you going to stay where you are because you are afraid to make a move?