Share your experieces

2 days ago i experienced sharp stabbing pains in my right ovary area which i believed myself to be 12dpo next 2 mornings(af day) yesterday i took a pt nd it was negative... All last night nausea a nd woke up this a.m and more nausea... Could the pain have been implantation pain, if so maybe i ovulated later than i assumed because my af is not here at all ..anyone ever had this experience ? What where your results?