I didn't know I hadn't ovulated, it was the first cycle after AF following the lose of Max so my temp was doing silly things. FF had my o date originally at CD 15 so I started testing at CD 20 (silly I know), but the lines on both types of tests were coming up well within the time limit. I finally got a positive OPK at CD 22 and temp increased again and gave me a new coverline. Ultrasound has confirmed o date as around CD23.