I need some advice from health professionals about careers?

I just don’t know what to do! I’m stressing out! 19 years old.Went to a state university for 3 semesters, first semester was bad but last 2 semesters were good. However I feel like I’m all over the place and I really don’t know what to do. Everyone else knows what they are doing with no trouble but then there’s me, I’m a little out there I want to try everything but not passionate about just one career besides just helping people. I really want to be in the medical field/health care, my ultimate goal being to use these skills to help in natural disasters, travel abroad to third-world countries and help people suffering from illness, but how do I achieve this? I took a break off school this winter semester to figure out what I want to do and it really sucks, I’m going crazy doing nothing(besides working part time at an annoying department store, no job openings at a hospital). Considering taking summer classes to catch up, I just don’t know what I should major in, whats the right career for my passion, the career center and counseling at my school really aren’t helping much, any insight? Please help me out!
yes i have always been interested in alternative medicine as i also am very against the use of drugs in medicine, vaccines, etc… however when i bring this up to people they often dismiss me as crazy. you seem very smart thanks for your advice