I was halfway through teaching a three-hour lecture on health care negotiations when it happened. One moment, I was walking my students through a high-stakes case study. The next, a hot flash hit like a wave. I peeled off my blazer, kept my voice steady, and tried to make it look seamless. I had chosen my outfit carefully, with layers I could shed and fabrics that would not betray me if sweat appeared, but inside, I was focused on pushing through while 60 pairs of eyes waited for me to continue.