Why do you want us to ease your mind?
You are retaking the test, you have already submitted the application and everything.
The only thing left for you to do is to work very hard and try your best to score well.
We can't help you. Nobody can help you but you.
DAT is a mental war. If you are prepared well, that's half of the war, the other half is to fight the one inside you that telling you won't make it!
I hope you do very well on your 2nd try, even if you are late, if you do well, that will enhance your chances later on if not this cycle then the next.
Best of luck!