I was in your situation a year ago. You have to have ECFMG certificate by scramble. Only if you are ready to take exam now, it might work. It takes 3-4 weeks to receive your score plus 2 weeks to receive the certififcate.
You are probabaly losing this year, try to spend it wisely. Study hard and retake the exam. Try to get clinical experience, if not, research experience will do. Get good reference letters from clinical US physicians.