I would do what others have already said, practice with you hunting clothes on from an elevated stand with broadheads and learn to get on your target fast. Shot opportunities could have a window of a few seconds and being able to get on your target is a must. You have two options, either get rid of the peep and use something like a no peep to help you remain consistent in your anchor or go to a larger peep size. I use a fletcher tru-peep super hunter 3/16 and it works great. As far as calming your nerves here is what I do. When I am practicing, I close my eyes and try to create a hunting situation in my mind. I imagine a big one coming in, I actually can cause my heart to start racing, my breathing picks up, and then I tell myself that this is your one chance. Then I make the best shot I possibly can. By doing this, I have learned to make shots under pressure and with the feelings of an actual hunt. By the way, that heart pounding feeling is whatI dream of all year long, and I don't ever want to lose that. But, I want to be able to make the shot under these conditions if the chance comes along. I know my little routine sounds a bit corny, but trust me, it works. Good luck this season.