My annual physical was nearly over. The doctor had asked routine questions, used her stethoscope to listen to my heart and lungs, and ordered tests of my cholesterol and vitamin D levels. Throughout the visit, which happened years ago, I pondered sharing what had been preoccupying me for weeks. It was embarrassing, unexpected and probably meant nothing, I thought. As my doctor’s hand clasped the doorknob, I finally sought reassurance. “I feel like I’ve been gaining weight,&rdqu…