Mid cycle spotting

Hi guys, I've having this light spotting during my mid-cycle since Feb this year. Been to the Gynae and being told it should be ovulation spotting. This month I have this light spotting on my cycle day 25 and did an ovulation test on the day itself and the day before but both results come out negative. What would the spotting be of and do I actually ovulate ? When will I ovulate after the spotting ?