Me and my boyfriend have had sex about a month ago, the condom had broke so therefore we opted to take Plan B after. But just as a precaution approximately 2 weeks later I had a blood test done to be sure that I wasn't pregnant. It came back negative. Also within that 2 week period I had some light to medium bleeding for about 1 1/2 weeks. Now I am waiting for my period which should be due in a week, but I have noticed that I am consistently nauseous throughout the day, hungry all the time, bloated, dizzy. So I took another home pregnancy test and It came back negative. Is there a chance I could still be pregnant?