5 Days Late - 3 Negative hPT

I am, as of today, 5 days late, 11 DPO. My periods are very regular - 27-28 day cycles. This is very odd for me. My husband and I have been TTC for 2 months. It is so damn frustrating to not know what's going on. I've been reading about hCg and how sometimes it takes up to 2 weeks missed period to show up positive. I've been a little nauseated, some abdominal cramping (but not consistent), off and on appetite, sore breasts but nothing bad. There's not any big signs. I'm not sure what I'm hoping to gain from this post. I just feel very frustrated.