Frustrated! One word. I know when you read all the stories on Dr. Norman's site every is great! Feeling weak has been my problem lately. Just not feeling good! Frustrating cause I will have periods - like 3 wks in a row where I'll feel 80%. WHY THE FLUCTUATION? My ionized calcium is still slightly up and I have 2 parathyroid hormones left. PTH never below 40.