Hi Ana, I am glad you have chosen or are considering political science and international relations. There are many options for you if you obtain a bachelor's degree in this area. In my case, I went to law school after graduating with a degree in political science and became a lawyer. However, many people do not go to graduate school, or at least not right away. Instead, they work in business or management consulting, teaching in high school (possibly internationally, through the Peace Corps), non-profit organizational work, or work for the state or federal government in a variety of positions. You can also work a political campaign or a lobby organization, do research for a professor, write for a newspaper or magazine.
It is difficult to assess all of those options while you are still in school. Most of your professors would have gone to graduate school to obtain a doctoral degree but they may not have worked in other areas for a while. So it is important to remember that a wide range of options work well for students with a degree in political science, even if the job posting does not specifically say "political science degree required." I would advise you to think about the career that appeals to you most for now. Would you like to be a journalist? Perhaps work for a U.S. embassy or consulate abroad? Join a non-profit that targets a worldwide problem such as hunger, poverty or access to education? Be the assistant to a state senator and help draft legislative language? Think about your interests and pursue internships in some of those areas to narrow down the list of your interest and choose a direction.