Learning to say no without feeling guilty

I have multiple sclerosis (MS), a degenerative, inflammatory, chronic disease that damages the myelin of the nerve cells in my brain and spinal cord. I’m constantly in pain and I experience deep fatigue. People in my life have told me to forget my PhD, to change careers, or do something else; but I proceeded anyway. In fact, my PhD is my remedy. My PhD journey makes me busy and helps me forget the fear and worries related to my MS.