The EMT route will do nothing to help you get into medical school. It is your grades in the sciences and your MCAT scores that are keeping the doors shut. Unless you stand back and try to analyze why you didn't do better in both, and then change, even if you get accepted abroad you might not--I said might, not won't--get back with an MD and be able to pass the four parts of the USMLE. I am a person who believes almost everyone is capable of A work and high test scores. Why that does not always eventuate is, in my opinion, unrelated to IQ but to a wide variety of situational circumstances, including poor study habits, unfocussed motivation, taking on too many hours of paid work, poor course selection and credit loads, weak test-taking skills, spending too much time on extracurriculars (of limited value for admission), and, most common, unresolved and distracting personal/family situations.
There are other options, again, none of them come with guarantees. Georgetown and some other medical schools have a one year graduate program with first year med school courses. Expensive, of course, but with a fairly high success rate. As you might guess, high success rates are also outcomes of stringent selection for admission.
Another option is graduate course work, not necessarily thesis research (your problem is course grades, not research) in biology or biochemistry. You must complete any advanced degree you start before you will be able to matriculate in medical school, although you may apply, as you can as an undergraduate, before you actually earn the degree.
Think about this, then do what you will or must.
