No matter what - rehearsed, under-rehearsed, over-rehearsed, doubts about rehearsing - the first gig is always the first gig, and you put on your little praying hat, batten down the hatch, and do what you do.
I believe that birth control is just like every other medication even though it's a controlled substance.
Large increases in cost with questionable increases in performance can be tolerated only in race horses and women.