AZ: Losing It

[AgentZero]

Hey folks, I'm just looking for a bit of help diagnosing one of my characters in a story I'm writing. She suffers from difficulty or a complete inability to seperate fantasy from reality, is a compulsive liar, is often concerned that others around her know what she's thinking, and tends to feel as though mundane, random events are directed at her, ie: while waiting a longer than usual amount of time to cross a busy road, she begins to feel that all the cars whizzing by are doing it on purpose to make her late for work, etc.
The symptoms have always been present, but haven't been pronounced enough for anyone around her to take notice, aside from thinking she's a bit 'odd'. Now, however (in her early 20s) the symptoms have grown progressively worse, prompting her to visit a psychiatrist who eventually tells you "You seem to be suffering from-" And that's where I'm stuck because I've just realized I don't know.

Anyone have any ideas?