Just make sure all the pre-requisite coursework is completed. Most speech programs don't require organic chemistry one and two, physics 2, bio chemistry.
The stats are good for med school.
Keep doing volunteer work until you are accepted.
Study or take a course for the mcat and do well on it.
Have a story for why you are changing to medicine. Show that you want to be a doctor in your extra curricular activities.
(And by you, I mean her)
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