Glitzy, I would say, congradulations!!!!
If your af isn't due until the 13th, then it is probably so early that the line is that faint.
They say a line is a line. Did it show up in the time alotted? Take another one in another few days, or if that is too expensive (which, oh my goodness, it can be), wait until next week (assume that you are pg, and take care of yourself).
The hcG hormone doubles every two to three days. The line should at least be a little darker by then. Goodluck! Keep me posted!!!
p.s, the creamy cm was a sign for me. I tested + at 13dpo. DARK. the dr. told me i probably could have tested earlier, but I was afraid of bfn.