sorry if this is tmi, the low down is I was due on 1st sept and nothing happened, did tests at home and gps all neg, a few days ago got the sore boobs and aching lower back and tonight went to the toilet and on the panty liner was brown blood not a huge amount but enough to make me wonder whether it could be AF (if i follow my regular cycle I would be due on next fri) I know i'm not pregnant suppose the longer af didn't appear the more I thought it possible, however I've never had periods like this before