AF was due 8/29 and had nothing but tested BFN. yesterday 8/30 had some spotting in the morning but by afternoon nothing. Then had sex and had some bleeding last night. this morning back to nothing and no sign of a real AF. not sure what is going on. The last two weeks I've had backaches, headaches, cramping, and fatigue. I never have symptoms mid cycle and my AF is usually on time. Any thoughts?