I'm still waiting with no sign of AF

AF is scheduled to visit today but there are no signs. I have endometriosis and I have a lot of cramping and bloating. I took a test this morning (because I've been counting down for 14 freaking days already) and got a BFN. My breasts are sore, I'm constantly peeing I feel like (which is weird because I'm a nurse and I rarely ever pee at work). I am going to test in a few days if AF hasn't shown up. I was just wondering if anyone has had a late positive HCG and if this sounds familiar?