I'm not sure if this will help, but I want to say that having such an existential crisis isn't just normal -- it's healthy. Staying up nights reflecting on your life and your choices aren't necessarily indicative of the need for a change: it means you're conscientious about the path you're taking (and relatively few people are -- which is important to note on a forum largely populated with people who want to make a dent in the universe.)

That being said, I think making huge decisions about the directions of your life before you hit a certain threshold of experience is like trying to solve a Wheel of Fortune round with only X's, V's, and I's on the board. It's a better utilization of your time and resources to educate yourself -- whether that's in a classroom or on an online forum -- to prepare yourself for making those decisions.