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I have just been diagnosed with vitamin B12 deficiency. (Pernicious Anaemia)..? - pernicious anaemia symptoms

I knew since 2005, as the boundary of this void space was, but since I have a hard battle with depression and anxiety, I do not think there was. It was only a "name" meant nothing to me.
There was nothing I could feel worse than I felt.
Having recently changed doctors, it is from the problems that arise after the blood tests.
I began a series of injections (the only way to B12) to replace, but I fear that the progress made in May to be confused with symptoms of depression, what does the doctor (you) nor some of the symptoms are similar. .
There is someone out there understand with some "easy," the information to help me define the two?
I suffered from depression for 8 / 9 years, which intensified abandoned in February 2003, suffering also from fear and not on my own.
If you save dreaded ..

Are these injections with me in a strange way?
I will accomplish in the position to more?

Can someone answer me a complete ..
I am confused ..