No AF but BFN

Sabrina • Married to an Airman. He is 21 and I am 23. December = Cycle 8. Impatiently waiting..
I hate that our bodies are so ridiculous. Idk if I'm so worried about if I am or not that it's making my period late or if I'm pregnant but I just want to know!! Lol I tested today and got a BFN but also no sign of AF. According to one of my apps im 4 days late and my others say im 1 day late. So anxious! How late were some of you when you finally got that BFP? Have you worried yourself late?