To be honest there is absolutely no point in your gp doing a review blood test that soon after loading. You have just taken onboard enough to sink a battleship! I learnt the hard way because my gp did all my tests whilst i was being loaded and of course they came back high! It would be a better indicator if they redid them after at least three months then that way you would possibly get a better picture.
The British Medical Journal, the British Committee on Standards in Haematology and the National Institute for health and Clinical Excellence all agree that testing for B12, once treatment has started, is pointless.
My summary document includes links to these documents with the relevant bits excerpted. It's in the third pinned post.
Content on HealthUnlocked does not replace the relationship between you and doctors or other healthcare professionals nor the advice you receive from them.
Never delay seeking advice or dialling emergency services because of something that you have read on HealthUnlocked.