8 days late BFN

I'm 8 days late today, had cramping since the first day of my missed period, bloating, gassy, fatigue, hunger and tender (not sore) breast. Negative on day 5 of missed period and negative today on day 8? Wouldn't it have shown I was pregnant by now if I was? Of is it possible there isn't enough hcg? Never more than a day or 2 late! How exhausting is ttc😤