Can't say for sure. Could be a bit of PP bleeding making a comeback. I bled one time a few weeks after my initial stuff stopped. But I do know that w/ my own dd (my 1st) I looked so forward to no AF because of nursing for a good long while and at 3 mos. BAM!! There it was like clock work. Now with ds it was 6 mos. So I guess it varies alot between people. HTH!