So, I’m 5 days late and I’ve taken two pregnancy tests- both negative.

I was on birth control until December. January, February, and March periods were extremely consistent- four day cycles, with the first day starting in the evening, each cycle 32 days apart. I took OPK tests in March for the first time. Unfortunately, I tested in the morning, which I learned later wasn’t the correct time to test. I got “high fertility” but never “peak fertility.” On the 14th cd, I had cm consistent with ovulation and we bd on that day. Now, I’m five days late and no sign of AF but also no positive pt’s. I vaguely remember someone in my family telling me that they never had a positive home pt and had to have a blood pt to confirm pregnancy. Is it possible to be pregnant and have a home pt detect it later on?