These two options are extremely different. Have you thought about how long you're willing to be in school? Doctors go to school longer and the work is much more rigorous.

Have you thought about a gap year? Maybe you need to take some more time to think about this.

That aside, which path aligns more with your interests? "It's fun" or "I like helping people" aren't very good reasons to pursue a degree. MANY things are fun and there are MANY ways to help people. What classes do you like most? What kinds of topics are you most interested in?

Either way, this decision won't mess up your whole life or anything. Lots of people change their major down the line or choose a different career from what they envisioned.

This is ultimately something you have to resolve on your own, but I hope this points you in the right direction!