Need help please!!!!

AF is due on the 12th, I've been cramping on and off since 1dpo(I know too early at that point to tell), but now I'm 8 dpo and I was cramping hard like af had arrived. I went to the restroom, when I wiped(tmi) there was light brown cm or something. My boobs and nipples,lol hurt something serious. My hips are hurting and lower back. I've also been feeling a little nausea and dizzy some days. I took a hpt this morning but bfn...... Ughhhh