i took hydroxycobalamin for b12 treatment and didnt have symptoms
but if i were you, id be really cautious about that as well since youve already had an adverse reaction
let your body heal, theres a chance you’ll recover some if not all symptom worsoning in a few weeks or months
not sure what to do about the b12 though
your doctor may not believe you about the syptoms. if thats the case then he wont even give you other options
maybe research if b12 deficient people have healed from eating foods with b12 abundance and with other foods that have b6 in abundance