I’m no expert on admissions as a med student myself but why even try to get into a post bacc? Do a DYI post bacc and just take the rest of your prereq‘s from your same undergrad or somewhere more convenient/cheaper if applicable. No admissions to deal with and just be sure to take a reasonable credit load to show you can get A’s in upper division science even with a lot of classes.
If you really want to apply to something and have something on paper to show for it do a masters (assuming you can get the remainder of your prereqs from it)
best of luck to you