Normally my cycle is like clockwork, 28 days to the day. However my last two periods have been 21 and 20 days, and I'm feeling periodic now, which is only 17 days - what the frick is going on? Dd is 2 next month, and my cycle has been settled for ages, so it's not that. I'm purdy sure I'm not preggers. The only weird thing recently has been a nasty bout of flu, but that coincided with the 2nd errant period and wouldn't explain the first one. Help! This is most peculiar for me.