From the album One Thing At A Time
This is about someone who has convinced herself that clarity is the goal while her actions prove chaos is the comfort zone. She catalogs the sensations of overwhelm without ever naming what actually overwhelms her, as if keeping it vague keeps it manageable. The climactic escape is flying down the highway the wrong way with the sun in her eyes, which means the peace she claims to want would actually terrify her.
I don't know where to start / When every thought at once / Comes flooding til I'm underwater
The drowning image is physical but the trigger stays abstract. She never names what thought or decision has her stuck, which suggests the paralysis might be the point. If she picked one thing to think about, she'd have to actually do something about it.
Over-analyse my dreams n pick apart the seams / Always working from the same old pattern
She describes her overthinking like a compulsion she's watching herself perform. The phrase 'always working from the same old pattern' means she knows this is a loop and keeps doing it anyway. Awareness without change is just another form of the same paralysis.
Oh my god just one thing at a time / Don't get why it's so hard to find / Some peace and quiet swimming in my mind
The plea for 'one thing at a time' is itself another thought flooding in. Peace and quiet 'swimming' in her mind is a weird image because swimming is active, not restful. She might want the feeling of motion more than the feeling of calm.
On a scenic drive, I'm flying down / The middle of the highway / Wrong way. The sun in my eyes
The supposed escape is fast, dangerous, and literally going the wrong direction. If this is what freedom looks like to her, then the chaos isn't something happening to her. It's something she drives toward every time things get too still.
The song ends with 'gotta fix this all somehow' right after describing a scene of total chaos, which means she still thinks there's a solution waiting if she can just think hard enough. The real tension is that her desire for change is another string in the pattern she claims to want to escape. Barnett never resolves it because the narrator can't.