They are very different types of jobs. They require different skill sets, offer different pay scales, and have different time requirements. You may well be suited for either one, but if you want to have a family (and not drive yourself crazy) you cannot do both at once, short of teaching in med school as mentioned above.
If you choose to become a doctor, you can also be a mentor for kids. Go into elementary schools and talk about what you do. Volunteer to be an adviser for high schoolers who need to present at mock career fairs. You can still stay connected to education without being a schoolteacher.
You might also consider becoming a nutritionist. You will be in the field of medicine, but more in a one on one adviser role.