What a bad day

Today is my first paper for final exam, Engineering Mathematics. I think I'm not prepared enough, the question mostly easy but confusing to me and it becomes hard. I think i just can't do it and im preparing for any consequences. I targetted anything realated to theorem will come out but in the end i can't do. I have not enough sleep, i went to the wrong venue, i forget to sign the attendance slip. Such a lousy day for me. This trimester really screwed up,i don't know why. Nothing seems to be perfect. Everything is like upside down to me. Still hoping for the best.