Ask in the music major subforum http://talk.collegeconfidential.com/music-major/
Also read:
http://talk.collegeconfidential.com/music-major/1948726-double-degree-dilemma-essay-written-by-david-lane.html#latest
i would highly consider finishing your degree. Having a STEM degree doesn’t preclude you from playing music. Here is an example (one of my friend’s brothers)
https://en.wikipedia.org/wiki/Michael_Hawley
WIth a degree you can make money. You can save that money to go to whatever school you want.