You might have to research this further but calcitonin can be tested for in your blood. High calcium means you may be low in calcitonin, since calcitonin puts calcium in your blood.

But, I think sometimes those blood tests are not that significant, esp. when it comes to calcium. Your body is trying to maintain homeostasis so blood levels are tightly controlled. The amount of calcium in your blood is NO indication of the amount in your bones. The amount in your bones is what you should worry about, not the amount in your blood.

It is like having low potassium levels mean you have some serious problems going on that may need more than just a simple potassium supplement. Some minerals in the blood are more important than others. Calcium is one I wouldn't stress about so much.

You might shop around for a better doctor. Most doctors focus on getting their patients in and out in about 20 minutes. That really limits the quality of the care. Doctors want to make money, so they don't spend the time with you to explain stuff or explore other possible options for you. You do almost need a biology degree or something to sort out health care issues.

But you could always ask around for a different doctor. Or, some offices have physician assistants who will be more helpful.