Ovulation

Hello,

I have tested for ovulation from CD11 twice a day. All negative. 

On CD13 in the AM i was negative then at 5pm i had a solid smilie meaning peak and no high. 

I then tested at 4am on CD14 and its back to negative. 

Is it possible that within 24 hours, i skipped high fertility went straight to peak and then ovulated within 12 hours from peak? 

Or was the test wrong? 

Please help