REG in 4days…. Pls save me

Actually scheduled on dec 24 due to severe panic attacks I rescheduled about 24hrs before, am I worrying too much? It is my third exam after AUD and FAR both thankfully I cleared. I don’t understand y I feel not confident to even appear for REG ….. with too much provisions I’m afraid I’ll confuse in exam… let me know ur experience pls