Excellent news!
You'll find that once you're done with the InstantCert review, and read the explanations from the first Peterson's test, you might even go up as much as 10-15 points on the next test and certainly by the 3rd one. As a final check on my most critical exams I sometimes randomize the InstantCert flashcards (and clear my IE cache!) and make sure I actually reread all the text that goes w/every flashcard - even if I know the exact one word answer - oftentimes it's what is also in the explanation that I find myself needing on an exam. I recall that the exam specific feedback for this exam was right on - I learnt those items also and that made the test very very doable as you can see!
Keep focused and you'll be there very soon! Have fun!