6 days late

Hi all. I'm 6 days late. Which is not normal for me. I've taken pregnancy tests, all come back negative. I have no sign of period coming like I normally do. Every now n then I get slight cramping in my lower right. Any suggestions? Has anyone been this late and had negative results but ended up being pregnant? I'm in the waiting room now at the lab going to get blood work to confirm but just was wondering if anyone had similar stories?