I checked on calcium levels. Yes, it is high, but there are a number of reasons that can cause it. Have you checked your parathyroid levels. I read up on the Mayo Clinic about calcium level levels and that’s one thing they mentioned.
Genetics or family history plays a major part as well As well as diet
Make an appointment with your doctor and start asking questions. Research it Google scholar is a good one. I understand because I did have problems years back with my parathyroid. It’s OK now.
Wish you the best