If I were to major in music history, what kind of job could I get? I don't really know much about it.

Erm . . . a university professor specializing in music history?

Usually there are people in the colleges who help you find jobs in your area. At least in my Community college there is someone who helps me out with music jobs. It's really awesome and she's incredibly dependable. So just wait until you take the class and ask your teacher or people at the college for advice. They'll most likely definetly help you out or be your connection to a job.

have you ever thought about going into music therapy??...youd need to do a lot of psychology for it, but it sounds very interesting and its certainly becoming in demand

I hate to be the fly in the ointment but having graduated with a masters in musicology I can say there are very few jobs you can get in music history. The main route is an academic one where you could try for a PhD and teach at a college or university level. But even there the jobs are few and far between. Given that arts are getting less and less funding, I just don't see the opportunities there. You can do what I've done which is to teach music history to children, but I've only found it to be supplemental income/work.

Why are you considering music history?