OPK Blinking Face to Low??

Mayra

Hi Ladies, I have been using Clearblue OPK for the last three days. Wednesday was low, Thursday was high and today was low. What does this mean? Could I have ovulated already throughout the day yesterday? I always go from low to high and then peak. Any thoughts? Per Glow I should ovulate on April 4th. Currently on cycle day 12 and usually reach my peak on cycle day 15/16.