I also had depression and anxiety and many other symptoms from my b12 def. I started out just taking 1000 mcgs of sublingule b12 supliments daily, but my symptoms weren't going away fast enough for me. I was still really tired, sick to my stomach, nervous, shakey... etc.

I started getting shots, 1000mcgs on a monthly basis, but also upped my daily doses to 3000 mcg then now, 5000mcg. But my levels were lower then yours, 185. I think as long as your taking your supliments daily, waiting an extra month should be ok, if you start feeling symptoms, take an extra dose... I think you can take up to 5000 mcgs a day??? you may want to check on that, but when I was taking 3000 a day, I would have days where I was more stressed then usual and would feel shakey, I would take an extra dose and feel better.

Your depression and anxiety may be so much better after your treatment. And as far as why 6 mths. That I think, is different for everyone. Once I started getting the proper dose of shots, I felt better immediately. But my like I said, my symptoms come and go still and it's been almost a year. But I just think my body isn't absorbing it, and I will be getting treatments forever now.