Sorry I read the original post and missed the info on you being a junior. When do you have to declare a major? Majors are generally 10 courses, which equals a full year. Some programs, including online programs, allow a change after as many as 90 credits, and will still allow a major change during junior year.
What most interests you and what do you do well at? You can worry about future career and professional school after you graduate since, as @thumper1 said, most majors will get you there. (Many CS grads do get jobs in that field after undergrad.)