Yes, you do sound burned out. A break is definitely in order, but not a long drawn out break...I would definitely not suggest you break until November. A week or two of GUILT FREE fun is a very good idea. I would do more than two weeks though...this is your future, you know!? I had the same problem before the Sept 30th test and I ended up postponing; I would study here and there, but nothing significant. I thought 2 weeks would be enough time, um, NO!
You know what motivates me to get my butt up and study now? LAW SCHOOL! The fact that I have a strong desire to go, and if I don't do well on this test I can pretty much forget about it. If you think about your future, and how badly you want this, that will motivate you to get your butt in gear. I spend about 2 hours studying in the morning before school and about an hour at night after work, along with all day study on Saturday. Whatever works for you, so if you feel taking another prep course is in your best interest, go for it. Like my man Malcom X said......BY ANY MEANS NECESSARY!!!