19 DPO with high BBTs and still BFN. Has anyone experienced such a long LP and BFN?

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Update- did not have to go for blood test. Temp dropped this morning and AF followed. Looking at my chart, I probably ovulated on 12/4.

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Update?? Did you go do blood work?!

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My last cycle had an 18 day luteal phase. Definitely go get blood work :)

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Mayen implantation dip on cycle day 30??
If so you may just not have enough HCG to show on a test!
I'm no expert on charts by any means lol but yours looks great. It almost looks like it's starting to go into a triphasic stage after that dip on day 30
Good luck!!!

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I heard that if you have 18 days of high temps post ovulation then you are most likely pregnant. Can you go in for a blood test? Fingers crossed for you!