Yeah I was going to say...maybe you are pregnant
It seems to be at about the right time for implantation. My doctor told me that sometimes you can get a "period" which seems a little more than imlpantation might be, but much lighter and of the wrong color than a regular period.
But it could also be stress as well...
I would wait maybe until your period would have been due and take a test
Good luck and let me know!