Help??

Sydney

So, my period is SPOT ON every month. I am NEVER late, nor early. My period has been spot on for 2 years, with no fail. I am ab 9DPO. AF is due in 4 days. I am having SLIGHT cramping. But barely noticeable. Back pain. I woke up during the night due to my breasts absolutely hurting me, I have never done that before. I am having superrrrr faint red/brown spotting. Only there when I wipe. (Will post pic next time I use the restroom.) I am very tired. IB?