Oh I am so sorry to hear this! I had the shingles at 36 years old & let me tell you, I’d rather have one of my epic migraines (which entails losing feeling on one side of my body, puking my guts out, having vision issues, & wanting to die) than have shingles ever again. It was so very awful. I really hope you never…

No, the nozzle shutoff is triggered by the Venturi effect occurring with the vacuum/suction of the air from the empty fuel tank up into the small hole in the fuel nozzle. Once the tank is full, the airflow through the hole is interrupted & a mechanical shutoff occurs in the nozzle ending the flow of fuel.

Most vehicles have a small arrow in the Instrument Cluster near the Fuel Indicator Gauge that tells you which side of the vehicle the fuel filler door is located on.