When my menstrual cycle finally started up again after giving birth to my son (I was breastfeeding so it took awhile) it was around 30 days. For the past 2 months including this month it's gone up to 33 days. It's now CD 34 & no AF yet, no spotting either. I'm hoping some of you might have some experience in this but what can cause your cycle to change so drastically? I haven't gained or lost any dramatic amounts of weight within the past 2 months, so I know it can't be that.