A year ago I was diagnosed with a vitamin b12 deficiency after being tested due to sudden neurological complications associated with b12 such as weakness, numbness and tingling, and pain. They also found the my vitamin D and calcium levels were low. No underlying cause to the deficiency was discovered and I have been taking monthly intramuscular injections for b12 since along with weekly oral doses of vitamin d. My symptoms had gone away but this last month I have had multiple occasions of my old neurological problems returning. These episodes usually last 3 hours and during the flair up I often experience extreme weakness, severly painful pins and needles sensation over multiple parts of the body especially the along the back and legs, feeling extremely hot and sweating however my temperature remains average, moderate to severe stomach pain and nausea, light headedness, muscle contractions/tightening in my arms legs and lower back, and if I do not remain laying down my blood pressure rises and I may faint. The entire day after one of these episodes I am left weak, tired, and often have a minor headache. These are all symptoms i experienced when first diagnosed and they have suddenly returned with a vengeance. When I contacted my general health practitioner she dismissed the issue as just a random flare up or potential strange migraine. In frustrated as these symptoms are very concerning and painful and I began the episodes only a week after my last vitamin injection so the flare up was completely unexpected. I'm just wondering if anyone can provide me with any advice or understanding as to why I would be experiencing these symptoms once again.