A 41-year-old delivery driver was rear-ended at a junction eight weeks ago, the seatbelt catching her hard across the left side of the chest. She was checked over that night and sent home: normal heart tracing, normal chest film, no fracture. The bruise faded inside three weeks. What has not faded is everything else. She has stopped sleeping on that side entirely, and last week she handed a run back to the depot half-finished for the first time in nine years — which is why she is here.