Like you get transported into an alternate universe where everything is almost same, but with tiny differences. The world looks normal to everyone and you’re the only one that have memories of the differences.
Do you think you would trust your memories or would you think you lost your mind?
They go over this in Doctor Who. There’s this special light that, when it touches you, it erases you from all time. Everyone forgets you exist (well, supposedly. There’s an exception). Good sequence.