I have had a few customers who have failed in their 'home' test centre.
Sometimes the brain can make unhealthy connections with the test centre if they fail a few times or even once.
Memories of the failure may come flooding back.
It is worth considering doing your next test at another test centre.
I had one customer who failed in Peterborough a number of times and she booked a last minute test in Kettering early in the morning.
She did not tell anyone and we left early in the morning, the journey from Peterborough to Kettering warmed up her driving and she was thrilled to pass.