RE: How do you get your confidence back?
If you bowhunt long enough, you're bound to find yourself in some kind of a funk, sometime.
When my confidence is blown, I do some unconventional practicing - shooting maybe 15-25 arrows at various ranges. Try a few elevated shots if you have such a place available. Maybe simulate a few hunting scenarios - try to get your heart rate up by standing on a stepladder or a 5-gallonbucket or taking a seated shot at a weird angle. Put somebranches between yourself and the target and pick a hole.
When you make yourself nervous - that's when you start forgetting things like "am I anchored right," "is my bow torqued," "am I using the same grip as usual..."
This will teach you to go through a progression, even when you're in a stressful scenario.
Visualize a real-life hunting scenario, not just a foam target.
If you have the option, maybe take one practice shot before you head out next time - even if you're shooting into the blockusing the headlights of your car.
Just that little encouragement in the back of your mind - so as to say "Hey, I just made this shot 3 hours ago in the driveway" - goes a long way.