I have been suffering from a terrible case of target panic for years. After deciding to use a clicker I have to say it has saved my shooting.
Eric, you might also have TP. The clicker is not fool proof, you have to be able to put together your own shot sequence and stick to it. When using my clicker I draw to anchor and then expand and "keep pulling" through the click. It is suppose to surprise you and that is your trigger to release, it's called a pychotrigger. The key is DO NOT shoot until you click. If you have to let down just do it and start your shot sequence over.
I will say if you don't own " masters of the bare bow volume 4" you should really try to get a copy. The section that helped me was by Joel Turner. Joel is an awesome shot and a real guru when it comes to explaining the mental aspect of shooting sports. You can also call him and he can talk you through it. Or in my case talk me down off the ledge LOL.
If you go into the shooters forum section here and look for the clicker thread posted by Clickerman (that's Joel's handle) he posted his phone number with an invite to call him and talk. I was very surprised with his generous offer and took him up on it. It was the single best thing I ever did for my shooting.
Good luck, it is possible to conquer the beast known as target panic! I know because I am living proof. Glen