It depends on what your practice scores are like. It's one thing to be nervous because you feel like you haven't been putting the working in. It's another to be nervous because you're afraid a topic you haven't seen will show up. If you've been studying 5-7 hours a day, effectively, for 1-2 months, and your average AA from BC is at or above 19 (with no scores below 18ish), you're probably okay.