Being Expected to Focus at the Wrong Times

I have my last SAT tomorrow morning at 7:45am. It is currently 11:45pm. My mom just finished talking and criticizing me for an hour about all my stress lately (I’ve been having lots of heart problems related to stress and I’ve had trouble sleeping.) Now I’m supposed to forget the many, many things and troubles on my mind to take a long, dreadful test that is also in itself extremely stress-inducing. How can I be expected to do so well with too much going on at once?! I can’t do this.