Well, congratulations? That has not been my experience, nor is the OP currently having that happy experience, but thanks for sharing.
Hopefully this hasn’t quite reached zombie status (only mostly dead, not yet reanimated), but I wanted to again thank everyone for their advice.
Seven days to go, but finally things are basically done and I slept like a baby this weekend 
Just please, take some time during these last few days to look at your lovely bride-to-be and think about why all this is happening. Because you love her and you want to spend the rest of your life with her. Imagine your fifth anniversary. And then tell her why you’re smiling.
Delegate one last thing: somebody on that day to remind you to relax and enjoy each other and the day. Things will go the way they will and it will work out.