I'd find a few more MDs to shadow as you said. Something that sticks out to me about your ECs is they all seem to be centered around clinical things/trying to get skills for medical school. That's a good thing of course, but is there anything else you are interested in? A sport, hobby, even volunteering for things that don't involve science/health but that you enjoy doing. I think something in that direction would make you feel less "standard" and allow your personality to shine through a bit more.