13 DAYS LATE NEG TEST (child mentioned)

Hello! We are currently trying to conceive baby number two. We've been trying for six months. I have three period apps, two of which "help" with my ovulating/fertility schedule. I even use ovulating strips. Pretend it's October: we did exactly what the apps said, I tested every day for peak ovulation, etc. For some reason my two fertility apps say my period should happen one week but my original period tracking app I've had for the longest time tells me my period should happen a week later than the others say. So I don't get my period the first week it says, so I'm like "well obviously they just had my period wrong it will come next week." Fast forward to today, I AM 13 DAYS LATE. I have not been late or missed a period in all the six months of trying! So I have been so excited and hopeful. But every pregnancy test has been negative. I started testing the day of my missed period. Negative. Everything I looked up said some women don't produce enough of HCG until one to two weeks after their missed period. I took another pregnancy test today, two actually - a strip in the morning and a "6 day earlier" ClearBlue tonight. Both negative. I researched more and it says it's possible to still be pregnant even if I get a negative test on the 13th day of my missed period. I am planning to test again with ClearBlue in the morning, which will be exactly two weeks from my missed period. The 14th day. Part of me is still hopeful because I tested positive with my first at exactly two weeks late, BUT I wasn't looking as closely at my cycles and I had symptoms then. Sorry for the long post, I just NEED someone to tell me the same has happened to them...that it is totally possible I tested negative today but my body will produce enough HCG tonight to give me my positive result in the morning. Please and thank you. Sending baby dust to all!