Should I get a further work-up for MS?

Amy ... I would say with a fair degree of certainty that your symptoms are not directly related to a medical illness. They are related to your worrying and stressful environment. You need to see a doctor, preferably a psychiatrist, for medicine and therapy for the neuroses. Your symptoms are typical of panic disorder. It isn't healthy to go untreated, because fight-or-flight response slows down our immune response and nutritional absorption ability making us more susceptible to disease. Chip