R.K.
You are still very young. It's not unusual for some people to change directions several times in a life time. Quite often a person will go to school intending on a certain career and then start doing it and realize it's not for them. So they change direction and start something new.
One thing you might be able to do is job shadow for a day or two. Many jobs allow this. Also check with a hospital or other medical center, quite often you can get raining and an internship without going back to school.