Implantation cramps

Has anyone had implantation vramps on only one side that last 2-3 days?? Im having a twingy/cramping pain only in my lower left pelvis, seems to be 'wrapping around' to my lower left back as well. It started 9 DPO, until today, 11DPO? Im hopeful, but sldo worried it could be just an ovarian cyst... Never had one before though. Any insight would be great!