zmx: Personally, if it were me, I would take a complete week of--regardless if there isn't any pain. Better safe than sorry. Not to mention, if you do aggravate the problem even more then you may be out much longer than a week.
As AvgJoe wisely says: Slow and steady wins the race
Sometimes you have to take a break because you went to far--that's part of the PE process. The real test of the men who PE smartly and those who PE impatiently is that those who are smart take a break when their body is telling them they need to.