Implantation or just another period?!?! Help!!

Melissa

Period started 7/2-7/5 (this was like 4 days early for me). Had unprotected sex on 7/6. Light (not even enough for a pantyliner) spotting started on 7/8....and ended last night 7/10. Is this possible implantation? Or just another period that’s out of wack? Any ideas?!