Vitamin b12 deficiency

Patient: I am 34 years old. Recently I got my vitamin b12 tested and My vitamin b12 level shows 109. I am now under treatment and general physician advised me to take 3 injections a week for one month. Each injection is of 500 mg. I am also consuming nervup od tablets every night after dinner. it’s been one week and I don’t see any improvement in my fatigue, forgetfulness, muscle pains.Is it necessary to consult a neurologist?

Symptoms: Fatigue, forgetfulness, muscle pains.