Your research and leadership are terrific. The shadowing was broad-based. I know the peds research was clinical, but can't tell if a med school would consider it sufficient for "clinical experience" since you didn't detail it. If it is, I'd say you have a shot at your state schools with your current numbers, and some less-selective OOS schools. If you aspire to more selective schools, I'm not sure a postbac would raise yor GPAs enough to be worth it. You could consider a Special Masters Program to redeem your low numbers.
You didn't happen to get an A in Biochem, by any chance? Any pubs?