This is how it feels to learn your memories are fiction
From the BBC:
A few months after his brain surgery, Matthew returned to work as a computer programmer. He knew it was going to be a challenge – he had to explain to his boss that he was living with a permanent brain injury.
“What actually happened at the meeting was that the employers said, ‘How can we help you, how can we make you fit back into work and get back on your feet again?'” Matthew explains. “That’s what they said. But my recollection the next day was that they were going to fire me – there was no way they could allow me back into work.”
The memory was very vivid – he says – just as believable as anything that had actually happened. Yet it was completely false…