Stress can cause flares or exacerbations for people with MS and other autoimmune disorders. Worrying about everything doesn't do anyone any good. Think about the last time you worried over something that was happening in your life. When you look back did you accomplish anything during the time you worried and were anxious? Probably not.
Diet is an aspect of your health that you can control. There are a few nutrition basics for living with Multiple Sclerosis
Multiple sclerosis (MS) is an unpredictable, often disabling disease of the central nervous system that disrupts the flow of information within the brain, and between the brain and body.