Oh but she did. Dr. Ford says ran out of the house but can’t remember how she got home, which Rachel Mitchell established was at least 8 miles away. It’s very unlikely she walked home. Much more likely she got a ride from someone else at the party or called her parents and they picked her up. Either way she did not run out of the house. The whole story has a dreamlike quality: she is suddenly there, things happen, and poof she is suddenly home. Another inconsistency is that she says she is locked behind a bathroom door and loud music is playing upstairs and downstairs and she develop s super hearing and can hear the boys laughing.
The mind can play tricks and put different faces on people, create false memories, and believe dreams are real. Sincerity of belief does not prove its accuracy.