FGLI URM here who submitted primary early August due to late June MCAT. I got very, very lucky this cycle with my acceptances despite getting WL at my #1. My app is much stronger now than last august so maybe I could have gotten into my #1 If I had just waited a year, submitted day 1 and practiced my interview skills?
Strongly suggest you hold off your app and apply day 1 next cycle. You want to get into the best school you can with the most amount of aid. Use the extra year to get publications, all of which can be put in your ERAS residency app. Depending on your productivity, you may not even need to take an extra research year during MS. You can also use the extra year to network with current students, alumni and faculty at your reach schools through SNMA and LMSA, etc. They may provide advice on how to write your application materials to resonate with their school.
The decision to apply is up to you but you need to ask yourself if you, or future you, would rather attend SGU next year or Havard the year after?