I Had Unprotected Sex On My Fertile Day And Ovulated

I had unprotected sex on my fertile day and ovulated the next day. My period is supposed to start in two days. But when I went to the bathroom earlier & wiped and there was some brown stuff kind of like old blood.
Like when I went to the bathroom earlier and wiped there was brown stuff ? It kind of looked like old blood & parts of it looked kind of slimey/stretchy. As I kept going to the bathroom throut the day the color kind of changed to a dark red color &a there were some clots in it. It's not really enough for a tampon. Enough for a thin pad I would say. Munich period is supposed to start Nov.9 (2 days) I took a pregnancy test and it came out negative. Also I haven't been expericing the symptoms I usually get when my period is about to start. (Gas, tender breast, and mood swings ) I've been experiencing some cramping in the lower abdomen area, but not unbearable cramps. They're just annoying. And like the upper part of my back hurts like smack dead in the middle & well I dunno my nipples just started feeling tingliyish