It is possible that what you have is ovulation bleeding. This type of bleeding can occur at the time of ovulation and clears up spontaneously. Pain on one side of teh lower abdomen can also occur at this time.
By hoc , do you mean HCG test? HCG cannot be detected at the ime of ovulation. And if your period on the 25th Oct was a normal period with normal blood flow, it is unlikely that you were pregnant on the 13th nov.
I hope this helps.
Please click on a positive rating to leave feedback.