Why do you not have any option other than nursing? I changed my major after my first year of school and even though I don't know exactly what I want to do with my new major, I felt so much less stress and anxiety after I switched (I went from Pre-Vet to Psychology).

Do you have an academic advising center at your school? There are usually people there who you can talk to about various career options. They may be able to help you find something you'd enjoy that would cause you less anxiety.