How many highs?

Britny • Babies 1&2 coming in August 2015 👶👱
So I'm on CD15 and I've been getting the same high reading on both of my digital OPK since CD9 (6 days total) tomorrow will make one week if I don't ovulate. Has anyone had anything similar happen? This is my 4th month tracking my ovulation and I've not had this happen. I'm usually a day 12-13 "ovulator"