anyone been through this? help please

Im currently on 9 dpo. And period is supposed to be her in 3 days. I dont have any pms or pregnancy symptoms. Nothing at all. No cramps no tender breasts. Just had some pulling in my right ovary on 6-7 dpo. What is this supposed to mean? Anyone was thru this? Help this!!! Anyone had similar experience and turned out to be pregoo?