I posted a month ago re worsening symptoms, thanks for those that replied. Sorry I didn't acknowledge this at the time but I am very poorly.
The main thing is I have developed a tremor and it is getting worse. I am now very aware of it. I "feel" it in my arms and a bit in my head. The pins and needles are better and tinnitus not so bad.
As suggested, I alternated my hydroxocobalamin with methylcobalamin injections, also making sure I have sublingual B12 (PAS suggested this). Taking folic acid and iron.
I don't know whether it's down to general ill health (have probable adrenal insufficiency) and feeling so utterly dreadful that it's effecting my B12 symptoms.
I just very scared now and hope this is not my life now.
Thanks in advance.