Question about ovulation date

Catie • TTC#1 since August 2014
Today is CD13 for me. I got my positive ovulation test this morning. Does this mean I ovulated yesterday? Or I will ovulate within 12-36 hours from now? Reason I'm asking...I see posts like..7dpo, test at 14dpo, what days will those be for me? AF due to arrive 7/1. So is today 1 dpo for me? Im confused.