HPT help

Stacey • 27. Married💍BFP 20-7-16👶🏻 Baby Jacob Born 25-3-17

Hey all! I'm wondering about HPTs. I know after test time has passed they are invalid and any result shown should be discarded but here's my wonder. After about 12 tests over the last 3 weeks (currently on CD 46!) all tests have shown negative with no trace of second line, even the next day (I know it's torture looking back at them but I get curious). Yesterday I done a test and half an hour later the second line appeared.

Has this happened to anyone early on on pregnancy to get a bfp within the time frame a couple of days later? I want to keep testing but don't want to waste the HTPs lol this is the closest I've got to a bfp so far.