Doctrine of Waste

So as I study interminably, well, not quite interminably, but as I plug on and on, I wonder a couple of things:

1) is it possible that I am studying too much, even for the second time around?

2) if the answer to #1 is 'yes', then is that going to be overkill and burn me out when the exam actually comes?

I don't think so, because I am taking off of work starting next week, and I could use a vacation from work anyway, so I think once work is not taking up so much of my energy, I will feel a lot less stressed about studying. But because I have been so steady at the studying, I don't feel so super stressed, more just like I hope it all gets done in the next three or so weeks.