In case anyone is keeping track, I went to a doctor today spur of the moment as I was passing the hospital anyway (lol socialised medicine lets you do that), had an x-ray which came back fine and they’ve given me diclofenac, to take 150mg of a day, and told me to go back on Friday for further investigations. And also my left hand is in a splint which made the drive back “interesting” in my manual transmission (stick shift) car.
They are going with the nerve problem idea mostly.