I am 5 days late for a 33 day cycle and I had some pink staining yesterday , BUT (tmi coming up) after "going In" to see if it was the start of AF or not, things came out clean! No spotting or staining today at all (and I wored my rear off so you would think something would have happened with af if she was gonna come!) I usually have so mild cramping and within an hour she is there but nothhing today after some monster cramping... So when should I test again you think? I got BFN on an FRER tuesday night...and do you think this is IB or what?!?