hello, I have 30 day cycles and I am pretty regular, I was due to start next period 2/13
/2016, but I started bleeding 3 days earlier and this has never happened before, I have no cramping or any pain, but it is kind of heavy and has bright red color to it , but it doesn't have any clots, it doesn't appear to look like my normal periods and I have had unprotected sex. Could this be implantation bleeding?