Hello, Jan !
If you can't contact the doctor, I would go back to your nurse practitioner to ask them where to start. The Spark members are vey knowledgeable and very supportive. But none of us is in a position to give you any medical advice. You need to speak to your doctor or your diabetes nurse practitioner. Both are better suited to answer your questions.
For now, I found this very general information on the mayo clinic website. www.mayoclinic.org/diseases-conditions/hyp
When I did a search on elevated calcium, I did find a number of different articles. The dilemma is that the citations are linked to specific causes. Because we don't know why your calcium levels are elevated, we can't direct you to something more specific. Thus the need to seek a professional opinion over the
For now, try not to worry. Try to eat normally. Don't do anything without talking to your doctor/nurse first.