I am in need of some advice. A little background about me. I have had every symptom of a B12 deficiency for 10+ years. Only 5 days after my first B12 shot did I realize that the anxiety that I had had for the last 10 years was gone. I live in the States and here we have something called a MIC B12 injection. Without knowing I had a B12 deficiency I signed up to get 6 B12 injections (on LivingSocial). I didn't know there were different types of B12 injections. Since I felt better and since B12 is water soluble I got 6 injections in 7 weeks. An hour before my 6th injection my anxiety came back. It has not left and it's been going on a month. Doing my own research I found that you can in fact overwhelm your system with B12 especially if you have PA or some other issue that prevents your body from processing it. I am waiting for lab tests and today I sent off a genetic testing kit. I do not know if I have PA or something else and I'm wondering if anyone on this website has ever overwhelmed their system with B12 and what they did to even it out? I have felt like I've had the flu for the past month and my muscles keep twitching, and tingling, and falling asleep. I'm working with a functional nutritionist but I'm not seeing results fast enough. Has anyone else been through this? Last week I was diagnosed with peripheral neuropathy but again I don't know what caused it (probably a B12 deficiency). I went to the ER a couple of weeks ago and all of my tests came back in the normal range except for potassium (3.5) and CREAT CLEARANCE EST CALC (low at 83.8). I should also tell you that in the states they don't do vitamin tests in the ER so I don't know what my B12 levels are or what my vitamin D levels are and won't for a couple of weeks. I am looking for someone who has overwhelmed their system with B12 and what they found was helpful? I have been peeing like crazy for a month but it's still lingering.