Hi. I have very regular period, always on time and always the same, heavy at first and very painful! Then by the third day I get light and little to no cramps. I am sexually active and I don't use protection and I don't know if I had sex around my ovulation time. With that being said, I am a little more then two weeks late on my period. I took a home pregnancy test 2 days ago and it was negative. That same day I started to bleed, it was a light pink and only noticeable when I wiped. the next day the same and today it has gotten a little heavier with some clotting and mild cramps and I feel really nauseated. I'm confused because this has never happened to me before, I'm always on time and it's always the same. I don't know if it's my period or implantation bleeding. Can I be pregnant???