Thank you to everyone especially Slow dragon and Seaside Suzy.
I managed to get a face to face appointment with a lovely new Doctor who was actually interested and knowledgeable on thyroid etc at our surgery. I explained my vit b12 deficiency and he said to test for pernicious anaemia, caeliac and put me on a course of vit injections.
Without the expert advice from this site I would :
a) just tried tablets which wouldn’t have helped due to absorption
b) not bothered seeking further help
c) not had the knowledge to discuss my medication.
d) not related the nerve symptoms I was having in my body to bit b12.
I am so grateful to Seaside Susy and Slow Dragon making me re read their posts
( brain fog and not comprehending info is also a symptom).
Onwards and upward for a healthier stress free life.