Hi everyone,
My update after a long break is that there is no change in the tingling in my hands and feet, perhaps slightly for the better. I have had to change up supplements due to one or maybe two causing indigestion. As for the B6 mystery, I will likely have a genetic test sometime in the future but for now my priority is SSRI withdrawal.
Thank you Mrs D for your advice regarding the latter but there is no drug that can assist with SSRI withdrawal sadly. Serotogenic agents are extremely dangerous to play around with during withdrawal and adding a new one will lead to disaster. Doctors at present have no solution for SSRI withdrawal syndrome and most prescribe something, which only makes matters worse. The only solution is tapering and time. Hopefully more research into this will be done.
I'll update again here if I discover something conclusive about my supplements, B6, and the tingling. For now, as symptoms don't seem to be getting worse, I am concluding that fluoxetine is the culprit.