I agree, I am worried, too. I work at a pharmacy but I have just now gotten my technician license, so I have no hands-on experience. I was planning on taking this exam around this past March. However, I chickened out at that but my decision is final this time. I am spending tonight (the night before) cramming a few things such as insulin and percentage calculations.
I am a member of a livejournal community for pharmacy techs. I have heard at least a few post about having a bad feeling they were unprepared or failed the test. Those who posted actually passed it despite what they thought. So who knows. We'll give it a try, right? I have been studing from three different books here and there. Good luck to us both!! Let me know what happens!