So you are doing a BA in music, which is an academic liberal arts degree. Are you performing? Are you composing and having pieces played? Do you have a composition teacher, or a voice teacher, or both?
Composers generally go on to grad school. Many of the top film scoring programs like you to get a foundational degree in composition first (like USC). You can certainly continue that way.
Vocal performers also benefit from grad work. Have you had any good roles while at school?
Then again, computer science will on doubt afford you a way to make a living, and you can continue with music both as an extracurricular and as an amateur eventually.
Remember that it is a gift to do what you love during undergrad years, regardless of career outcome!