Stop, think, breathe in, breathe out, go.

Today I had a talk with a certain person (who will remain anonymous) about the struggle many people of our generation go through (at least in Germany and most parts of Europe):
You start university and after the first semester you realize that you absolutely hate what you are doing. You hate it with a passion! And you wish you had had more time to think about how you are going to spend those few years that will determine the rest of your life. That's a pretty tough decision, I would say.
This very person went to university to study something you native English speakers would call International Business & Finances. Now let's look at the classes he's taking in both 1st and 2nd semester:
Communicative Processes, Decision Theorie, Accounting, Controlling, Finances, Investments, Maths (oh really?), and good old Statistics. Well, that sounds like fun! That's like forcing you to eat potatoes, chips, and french fries for breakfast, lunch and dinner for the next 6 months. But not only that, your class-"halls" are overcrowded, nobody knows your name, nobody hears what the professor is saying, and nobody cares if you are there or not. But you better stick to this, or you will have to start from zero again!
Now, I really don't want to sound like I'm doing cheap advertizing here, but the American system is so much better! Like in Europe, kids go to university immediately after high school, BUT you are given 2 years of time to figure out what you actually want to do. You have room to breathe and try around. Anthropolgy, Statistics, Public Relations, World History, whatever you want to take, take it! Just because your major is Psychology does not mean you have to take 15 different variation of Psychology classes for the next 4 years. Oh, and you don't have 400 classmates, you have maybe 20. So when you come out of University, you will have a degree of whatever your major was, plus a little experience in every other topic that interests you.

It is important to be sure of what you want to do. And when going to college still allows you to think about your choices while you are studying, it is definitely much easier to stick to your decisions.