FIRST, EVERYONE will tell you it’s impossible. That’s just part of the process. Ignore them. Almost anything is possible if you go about it the right way.
When you’re sitting on your dormitory floor crying your eyes out because you can’t figure out whether it’s irresponsible to change your major to English or not, remember that. Remember that this decision isn’t the crux of everything else in your life. You’re allowed to change your mind. You’re allowed to fail. Most things in life can be shifted and redone.