what a fun idea! Being undiagnosed, my screenplay would have a bit of a different direction...
I'm thinking murder mystery style with the innocuous meeting of strangers coming together with the blind invitation that is cryptic but grabs the curiosity. Throw in a little humor with some misdirection, and some intrigue with solving the case. As it unfolds, you realize that no one was actually murdered and the mystery to solve is actually introspection and personal growth.
Or maybe Sundance style suspenseful stalker movie, where the neurological symptoms are creeping up on the heroine of the story. Everyone else can see as it advances, but the heroine is blissfully unaware until she wakes up one day in a strange house with no recollection of how she got there.
I could probably keep going, I may add more later... but it's dinner time and it smells delicious 😁
I look forward to other folks' ideas! 💜