14 days late

Alexis • Mom of a little girl ❤️ Aubree Elizabeth Dellinger was born 9/1/28
I took a pt today and it was negative. I'm not stressed, I haven't been working out or changed my eating. I had spotting for 2 days. Very light a couple days ago.  My first child it took a while to get the HCG. What's going on? Has anyone else had this?