Symptoms & advice needed please

Hi I’m Lola & new to this forum but just looking for some advice as I’ m feeling concerned and a little lost about my symptoms. It might be easier if I list them so here goes: I get a strange shaky feeling inside my brain which is difficult to explain & light headed or dizzyness / extreme exhausion/ blurred vision in one eye / frequent urination / long pauses between words which has only started recently / aching body esp in the morning / occasional pins& needles / + more.

Iwas recently diagnosed with vit B12 deficiency & all additonal bloods cameback with no cause for the deficiency. I hahad injections but still experiencing the strange headiness & tiredness, tingling etc.

I was thinking of having an eye test but I’m not sure what I should be asking the optician to check for. Any advice would be appreciated.