TRYING TO CHART BBT CONFUSED

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so I started tracking bbt and little confused on understanding it if someone could give opinions?! glow has me ovulated the 26th because my opk was positive but think I actually ovulated 28th or something! at first AD was due 11/11 now glow has it in 11/9 and another app has 11/13... any advice?! co I believe is high soft closed and cm is creamy white to clear and stretchy?