Implantation or period? TMI warning

AF due tomorrow and today I had some brownish mucus with light pink spots. Then again light pink spots an hour later. I've tried feeling for my cervix but never tried before and wasn't able to find it. Here's the really tmi part: I put my finger as far in as pos and no blood came out on my finger. I would have thought if it was AF starting then there would have been something. I've had potential pregnancy symotoms (including colostrum leaking - ttc for #2, haven't leaked in months and this def was colostrum, not milk) but stark white BFNs. I've had some cramping today. I know I'll probably have a better indication tomorrow if it's AF but you all know how time drags out when ttc. What do you think?