Hi I had sex on dec 10th 2008. On dec. 28th I started spotting brown and pink which was only when I wiped for 6 days. I have swollen sore breasts and nipples and am craving foods and having cramps sorta of like af that come and go all the time. I also am eating more. Despite all of this I did a hpt today and it is neg. Can I still be pregnant or is something wrong? My period is due on the 25th of this month.