Questioning my sanity

Today's session in theatre history was intense - very intense. I left class wondering if I knew what I was doing, or if I really was insane. We got our first written assignment. We're reading Aeschylus' "The Oresteia," which is not a problem. It's the written assignment that is giving me pause. We have to plan and deliver a lecture on the plays, as if we were teaching an upper level undergrad course. Our lecture notes, in whatever form, as long as they're typed, are to be handed in, and our lectures will be given to our classmates and prof. Talk about intimidating! The prof has a doctorate in theatre history and I feel like my classmates are so far ahead of me. I know I'm freaking myself out, and probably for no good reason, but what if I'm not? What if I screw up? I'm worried that I'm going to fall flat on my face and that I shouldn't even be here. AHH! Why do I always do this to myself - look for reasons why I will fail? The good news is that we have a couple of weeks to prepare, and maybe it won't be as bad as I think it will be. It's just that I want to do well and yes, I want an A, damn it! Anal-retentive perfectionist tendencies are very annoying at times - LOL!