How many of you didn't get a BFP until after they were late?

[PositiveThinkingCG37]

I'm cycle 3 cd 26 and still getting BFN despite my temp still elevated white watery creamy cm lower back pain slight pulling pain but not dull AF pain... AF not due til tomorrow or possibly Friday... so confused 😢

I've taken two cb tests and today I swear I can see a very very very faint blue line... hubby can see it too but he thinks it's just a manufacturer thing... going for first response tests today.

Any help / advise or anything would be great?