Somatization?

As I was driving to school today I started getting really sick and had to stop at my sister's house. I ended up throwing up and not being able to leave her house until much later in the day. I missed 2 classes and therapy appt. I think it may have been psychosomatic. I think I was anxious about starting school and going back to school without being a PhD candidate. I don't know if I am ready to write papers and do presentations and engage in school again. Or it may have just been the eggs I had for breakfast.