If you do the math, you'll see that three semesters of 4.0 GPA won't get your low cGPA close to the mean of accepted students (3.65) at allopathic medical schools. My rough calculation says you'd potentially be at 3.47. You would, however, be in the ballpark for acceptees at osteopathic (DO) med schools (3.45), so you could consider that route to becioming a physician. AACOMAS, the DO school application service, will substitute a retaken grade for the original one, allowing your application GPA to rise faster if you take that D class over again.
If you are committed to the MD route, a very high MCAT score might get you in after you repair your GPA (AMCAS, BTW, will average a retaken grade with the original rather than replace it). Most would enhance their chances by doing an SMP (Special Masters Program) to redeem their low GPA if they get a decent MCAT score. Last option might be to go to the Caribbean for an MD degree (and this is a very poor last option).