B12 deficiency

i have recently been diagnosed as B12 deficient with a low reading of 124 ( i am told this is low ) My symptoms were awful : too weak to stand, couldnt leave the bed, couldnt visit bathroom etc Feeling Depressed i have had 3 injections out of 6 but not feeling too much better, although i am now walking and taking care of myself. I have pins n needles in my hands, legs feel weak still: When will these injections start to make me feel better ?

im on my 2nd jab of 6 and feel the same. i started taking folic acid too as ive read i need it for jabs to be effective. wasnt told that or prescribed them by gp.
wish you all the best with your treatment.

To update you my friend. I am now one week after my final and 6th jab. There is a slight improvement in my pins n needles, although not completely gone. Fatigue and tiredness in the legs are unbelievable. Feel pretty low too. Thanks for your comments and the folic acid suggestion