Late, but just got a negative from blood test

As a teenager my period was always irregular, had problems with paps, but now that I am 27 years old things have been going steady for a while. My boyfriend have been trying for the past 2 years, but nothing. We recently went on a cruise for some a lone time and had a blast. Supposedly that week i was ovulating. My last period was October 6th, and now i am 6 days late. I have been feeling weird (queasy, lower abdomen pain). I went in to the doctor's office to take a pregnancy test (blood test) and just got the call that it is negative. I wanted to cry as she told me to wait another week and if nothing i should come in again. My body is always giving me mixed signals as the test give the opposite result of what i'm feeling. is there anybody out there that can relate?