pregnancy symptom?

Ashley
Af was suppose to arrive December 4th so I'm now a day late. My periods have been regular since June. My cycle is 27 days average. Usually start in the morning. I'm 
14 days past ovulation. The only symptom I may have had was I warmed up pizza Thursday and I ate one piece but got nauseous thinking of eating the second piece so I thew it away. My boobs are a little sore and a little cramping. But I haven't been late for any of my periods within atleast a year so I'm not sure?