You can use them throughout the week.
In the "old days" you used them or lost them, but not anymore. That being said, if you exercise heavily it is a good idea to eat a least a couple of extra of your AP points (especially protein).
Good luck with your journey!
2016 workout goals: (edited)
100 Bikram yoga classes mimimum
365 workouts minimum
120 bikram yogas
400 total workouts