Re-taking would improve your GPA, but people are getting in with GPAs lower than yours (including me). If you don't get in this cycle, I would definately call the admissions counsellors at the schools that you are most interested in and ask them what you should do to improve your application for next year.
I'll tell you, my back-up plan was to do a masters at the medical school that I wanted to attend. Several schools have Masters in Biomedical Sciences or something to that nature that you can do. Particularly at CCOM, I was told that their program was very similar to the first year of med school, so if you succeeded there, it would look highly favorable on your next application.
But, I digress... back to your original question. I would in fact call, and send a letter of interest or intent. My app was complete late as well, and I heard very quickly from a few places. Some schools are much slower than others, but without knowing where you applied I can't say which you may expect to hear from yet. Anyways, call and check the status of your application weekly if you want, they won't be put off by it.