Good question. Choosing a major and pursuing a career is definitely a big decision to make, but it is only as stressful as you make it out to be. There are many ways that can make it easy for you to pick a major and choose a career that you will end up liking. The previous comment had some good points about shadowing a professional to see the kinds of things they do on a daily basis. This will give you an idea of the things that are expected of you which should help you decide on whether or no the career you are interested in is a good fit. Another good idea is to do a couple internships during college to further explore what it is like to actually perform your job duties. Many places offer internships and they are a great way to gain relevant work experience and explore a career. Instead of jumping into a career with no background knowledge, internships help answer some of the questions you may have surrounding the work and what it is actually like.
Another point, choosing a major/career during college does not mean that you are stuck with it for the rest of your life. People are increasingly working more and more jobs and career switches are becoming even more common. I graduated college May 2017 and was working in this one job for about 7 months. At the 7 month mark I decided that the job was not for me and was lucky enough to get a great job with PwC. I didn't feel stuck in my old job and mobility was definitely possible. Try not to view a career/job as the only thing you will do in your life as it will only cause you unnecessary stress.
I hope this helps and I wish you the best of luck!!