Did you recently come off BC?
No I haven't been on bc in over 2 years I think
hmmm... that was my only thought was that the bc was causing this but I am not sure now. It sounds too early to be implantation bleeding (that wouldn't be for another week or so assuming you Od on CD 14).
I would think you should test just in case your "period" was faking you out for some reason.
I am pretty stumped though....my only other suggestions would be call you doc to see what they think.
Sorry, I wish I could be of more help.