I'm still very new to this sport, and still get nervous before every jump. To be honest, I hope that never changes. Part of the fun is overcoming the nervousness. There have been a few stunts that I've pulled in the past that scared the shit out of me. It was the biggest accomplishment to me taking the fear, pissing in its face, and telling it to fuck off while I landed the trick / stunt. This sport is supposed to be scary, right? That's what makes it fun!
I'm willing to bet that the next time you're getting out of the aircraft and are scared shitless, once you let go and land like a boss, that's going to be one of the most fun jumps you've made so far.