Trying not to freak out about my SAP certification exam today

I know that getting anxious about this won't help. I'm trying to stay calm but so far it's not working! I feel so unprepared because there is so much to know. I just need to pass. Dear SAP Gods, please allow me to pass!!!

Random question: Do you breathe through your nose in the shower? If not, why buy nice smelling shampoos and body washes? I don't get why I smell my body washes or shampoos before I buy them because I don't breathe through my nose in the shower.