I had parathyroidectomy surgery done in 2014 due to high calcium and they found 2 enlarged parathyroid glands that were removed during surgery. I had high calcium (above 10 is high for anybody especially with a high Parathyroid Hormone test (PTH). I suffered for over 2 years because the doctors didn't think it was high because my calcium was still in the normal range? I lost weight and was very sick for a long time, before I found out I had Chronic Lyme's Disease last year. I weighed 82 lbs when I finally found a doctor in another state to do the surgery. I know now that the Lyme's bacteria was making my parathyroid glands enlarge. The lyme's can cause inflammation anywhere in your body, and especially affect your thyroid gland. I had never heard of parathyroid glands either, until I was diagnosed with it myself.
The only advice I can give you, is never give up on finding a doctor to look in to the matter more. Even though you have Lyme's other problems can come up that need to be treated. I don't know what would have happened to me if I had not kept searching for a doctor to treat me, when all the other doctors were giving up. I even had 1 doctor tell me "just to wait and see", I don't think after weighing 82lbs I could keep waiting around to see what would happen. High calcium can cause a lot of problems in your body. Your calcium, PTH, ionized calcium, D3, and magnesium need to be checked. All of these work together. You need to find a doctor who understands the parathyroid gland. Everytime I would say parathyroid, they would put down thyroid in my medical record. I don't know if the doctors even knew the difference.