Nervous Wreck

Since I've started this research, I've had this feeling in my stomach, a knot if you will. I can also feel my heart beat faster. If I remember seventh grade health class (shout out to Mr. Harmon!), then I know that this is not good, especially since it has become a constant in my life. This whole thing is so expensive and I feel incredibly unprepared and maladroit. What should I be doing here? Am I finding out anything new? If I were a smoker, I would yank a cigarette out of my pack, light it, hands shaking, and take a long, desperate drag. Wow, that fake smoke kind of calmed me down. Seriously though, if anyone has done this before, this field-work thing, please let me know your secrets.