Used SI negative HPT temps still high and no AF

[BZ88]

Anyone else have this happen. I'm on day 36 and here's my chart. It helped me to ovulate but now my period won't start.

<a href="http://FertilityFriend.com/home/29541b/">http://FertilityFriend.com/home/29541b/</a>
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29541b Ovulation charts on FertilityFriend.com (http://FertilityFriend.com/home/29541b/)