Give some more mock tests, like pmstudy... you need slightly more practice

 I am studying as well..here's what I found from my research:

Make sure you know the process chart and how it flow.  I memorized the process chart, but mainly as a tool to understand the flow.  

I have found examcentral.com very helpful .  It has a lot of free questions.

Brainbok..is a great tool to understand the flow. I bought the tests mostly to support that site.  

PMTrend has a game called the Rita Process that helps

I have been finding that reading the PMBok is really the best strategy to pull up my mock test scores.   I use apps on my ipad at lunch time as well.  There are a lot of reasonable apps that either focus on ITTOs, definitions or questions.  

I feel comfortable now with 3.5 weeks to go.  After really focusing on the PMBok and PMZilla study guides along with understanding the flow, I did get a 73% on Lehmann's test and in the 80s on head first both on the first attempt.  The one thing I found was it's pointless to go thru a test if the explainations aren't clear enough to raise my scores.  

I plan on at least purchasing the PMStudy tests prior to the exam.  So far I have been holding off on this to save it prior to the test, since it's suppose to be a good indicator.  I have heard Transcender has good tests as well, but I just found out that my contracting company has a bunch of free tests that I will look at.  

Good luck