Listen all new L&D nurses feel the very way you described. I did when I was a fresh L&D nurse. Just about the time I thought I had it all together something would happen and knock my confidence right back down to the ground and I would start to question myself and my abilities. I promise it gets better with time. Everyday I still learn something new. You hang in there and I promise it does get better. I've been an L&D nurse now for 12 years and I love it as much today as the first day I stepped onto the unit. Good luck and keep your chin up!