I would think it highly unlikely that the pain in your left shoulder, arm and fingers (you don't say which fingers) is anything to do with your broken wrists when you were younger.
RSI is a possibility but in my opinion ...unlikely.
Spondylosis of C3-C6 is the likely cause, either a prolapse of the disc or osteoarthritis in that area....or indeed ...both.
See you GP as you may well need an MRI scan to sort that lot out.
In the meantime.....keep "popping the tablets."