I had AF type cramps on 5&6DPO which correlated with a small drop in BBT. My LP has been 7-8 days so I thought AF was coming but then my temps went back up and the cramping stopped (so of course I got excited and thought it was implantation) only to wake up 10DPO with temps still high but pink discharge. This continued all day (just small amounts but enough to need a liner).