If stitches or sutures have been placed post extraction or any other surgical procedure done, usually there shouldn't be any complications since mouth is a an area where healing is good. Please follow all post surgical instructions given to you and take medications has prescribed.
Next Steps
White slough or scar you mention is all part of the normal healing process.
Health Tips
Wish you a speedy uneventful recovery. Post surgical care is better taken care with a dentist near by.