It does sound like maybe you are just in a position where the lesions either are not in typical MS locations or there are not any new ones showing up to meet the "disseminated over time" part of the criteria. Hence the doc thinking it is likely MS, but the professor wanting to stick to the diagnostic criteria. I will say that my mom struggled with hypercalcemia for a while, and it was very debilitating for her. She was lethargic, very fatigued, and had a great deal of mental sluggishness until we got her calcium levels back closer to normal. So do pay attention to your symptoms and log them and their severity over time, to share with your physicians, but also consider that they could have other causes as well.