We are ttc no.2 and my 14mo DS stopped bfing 2 months ago, I had no periods while bfing. Since then I've had one period that was very heavy and painful but have since been monitoring signs of ovulation etc to try and figure out my cycle. By my calculations I should be on my period, unless we conceived but I've done 2 negative tests. DS's sleep has gone to shit over the last week so I have had to get into bed with him every night this week. Could co- sleeping delay AF?