i am also in the same boat. I am six days late today and yesterday i went to the bathroom and had clear discharge with red streaks in it. then afterwords it was just brown discharge. i only had to wear a panty liner. wasnt very much at all. and now today even less brown discharge.
i had the same situation. my last AF was july 29, and then around sept 13-19 i had brown spotting but def. not a normal period, and all my test turned out neg. i dont know what was up to make a cycle like that, but i'm very doubtful i am pregnant, although i have a friend who didnt get a BFP until 3 weeks dpo. and i have no idea when i ovulated, so no help there lol
i would wait a week and then test again. you may have just ovulated later in your cycle than normal, and this bleeding could be implantation bleeding. Best of luck!
I say, take an hpt on 14dpo. Sending you baby dust.