Hi Amanda, I can relate to a lot of what you write about your varied interests (especially languages), useless degree, and confusion about your career path, from the perspective of someone a bit older (32). I wanted to give you one concrete career idea and some general encouragement. How about translation? That might allow you to work on topics you're interested in (history/economics/politics) while getting to use your language skills. Your technical knowledge of economics might be handy depending on what kinds of translation projects you work on. My main advice, though, would be not to worry too much about picking one grand career path. You don't have to decide now what you'll do forever--you just need to decide the next thing, and often the skills and experiences you collect in one job give you ideas about where to go next. (Don't know if you have any interest in Washington, DC, but we have a great job market, you can always get a job teaching ESOL or working in international development, and a quantitative degree is often a valuable asset.) Good luck!
My one thing was calling my health insurance company to figure out what the hell is going on with my plan, my HSA, some surprise bills I got, etc. It wasn't that bad!