Do I have Hyperparathyroidism or Anemia or both? My Sestamibi scan came back negative, but my calcium level is 10.3 and my PTH is 154. Now my Endocrinologist wants me to have a SPECT Sestamibi scan. How is this test different? Per my doctor I'm taking 50,000 IU Vitamin D once a week because my body is eliminating that along with the calcium. Should I be taking Vitam D? I was also told I'm anemic. They seem to have similar symptoms. I can't get any answers! Can you help me?