Brown blood

I’ve been having this dark brown blood for almost a week now.. my period is 12 days late & was supposed to come 12 days ago... this dark blood never lasted so long I dont even ha e cramps with it. It doesn’t even feel like my period is coming at all and it’s very unusual for me bc I get BADDDDDDDDDDDD cramps before and during. Its there when I wipe but nothing drops in the toilet like how period blood usually does and by then it honestly should of came by now if it was coming...what do you think.