the ECs you need to complete will be a little different. You will still be expected to get some form of community service and whatnot. This why med school is hard for nontrads. Not that schools don't like us, it is that they don't really cut us any slack. When you are looking into medicine as an undergrad, schools need to know you understand what healthcare is really like. You got that covered. As far as clinical ECs, you will be more than fine. You know what it is like and know what a doctor goes through everyday. You will need to give back to the community though. My kids go to a parochial school so i volunteer weekly for their "safety patrol" and during events when i can. usually about a half hour every week and then a 2-4 hour stint once or twice a month. I usually average about 2 hours per week. I work full time and part time, so hopefully this is adequate, and I have heard that it will be.
so get some community service and you will be rockin.