Confused...answers please

Samantha • TTC baby #3 (1st planned)
So af came a day early this month (which made me very sad) and it only lasted 2 days and on the 3rd light spotting.. I've always had a 7 day cycle so idk what's going on. I've read about implantation bleeding and it seems like it could be, but I don't want to get to excited.. has anyone had this happen? If so, what was your outcome?