The OPK test I have been using is driving me crazy! I have been using the Clearblue Advanced kits and it seems to be giving me some fits. I used one on Wednesday and it showed a blinking face (from the directions this means a high level of estrogen has been detected). The same blinking face has showed for four days now with no solid face (solid face is an indication of LH surge). Has anyone else experienced this? I feel like I may have missed my LH surge.