Thanks, everyone!
I'd been told I had an A-/B+ going into the final paper, so I was trying to moderate my hopes. And I was pretty happy with my final paper, but I wasn't sure the prof would be. I was concerned that she would want a pure philosophy paper, whereas I tied the philosophical concepts we had been discussing to psychological findings about the subconscious, heuristic decision making, and cognitive styles.
I guess she liked it after all.