It could just be "old blood", as in you might be starting your period soon. It could also be implantation bleeding. Some women don't get positive pregnancy tests for a while, it all just depends on hormone levels. I would try waiting another week, and if you don't start your period, take another hpt or go to the doctor for a blood test. Good luck!
Im having the same problem, i have been trying for more than 4 years to get pregnant and no luck. i had my ovary removed and my dr said that i might or might not be able to have a baby, i was to have my period this week and all i got was small brownish spotting for a day. and i took a preg test and it was negative, but i havent gotten my period yet and i feel soo sleepy,not hungry,my back hurts,my body dsnt feel the same and i dnt have any sex appetite. can i be pregnant? can it only be my period is late? WAT SHOULD I DO ?