For DO schools, you don't have to retake as long as you apply broadly and to a lot of new DO schools. For MD schools, your highest chance is with your state MD school (s) and with mission based schools (Loma Linda, HBCUs). If you speak Spanish, you can apply to the Puerto Rican MD schools. For all other MD schools, you have a 10-40% chance of receiving an acceptance letter depending on your GPA and ECs.