no period but negative results??

I haven't been stressed lately but I also haven't had my period since October 23rd. and I am always on time with my periods never even a day late but possibly a day early. I had a pap smear scheduled for the 20th of November and doctor said everything is fine. but I take a test and they are negative. I have been nauseous, motion sick, been getting cramps, but I was also spotting around the time of my period. but the color of everything was a light brown and it was mixed with vaginal mucus. I took a blood test yesterday but I haven't heard back yet. My husband and I also had sex on my most fertile day and yes he did ejaculate inside me. But after all of this what could this mean