I started birth control almost 2 months ago. I have been have pregnancy symptoms to the T. My breasts have been extremely sore, to the point that I don't want to wear a bra. My stomach has been very bloated, I have had problems going to the bathroom, headaches, low back pain. My period is usually about 5 days and very heavy. My last period was only 3 days and very, very light. I took a pregnancy test today and it was negative. I am due for my next period in a week. Is there still a chance that I could be pregnant?