Do a postbacc program that isn't undergraduate level. Go somewhere like Drexel, PCOM or Loyola and do a graduate level program that will make you more competitive for medical school. Retake the MCAT. Schools will give you more respect if you can do all of this while working full time in research. People who work full time look badass when compared to students in programs who just take classes...you have credibility when you say you can handle the demands of med school. Hard? You bet. Here's to hoping you can pull it off the first time around. If you don't get in, toughen up and kick *** or roll over and give up. TT is right, growing a mustache helps, so does lifting weights.
Good luck.