TMI - sorry!

Hi ladies, hoping someone can shed some light. Attached below is my date calender as well as my bbt chart. According to glow my high % days during the fertile period was the 1st & 2nd Aug. AF was meant to arrive on Friday the 15th and NOTHING!! Last night when I went to the toilet I did wipe and the toilet paper had a small tinge if brown in the CM which is creamy consistency. Today when going to the toilet I wiped and it was only just there. Does anyone know what could be happening? Is AF on her way, maybe late ovulation leading to late implantation? My temps have had a slight drop as well. I feel really good.  No bloat like normal around AD time nothing at all!! HELP!!!​​