I gave birth at the beginning of November, 2006. On Dec 31, 2007 I had my first period. I had my second period on January 29, 2007. By my calculations I should have had my next one on February 28. It is now March 5th and I have not started. I am not on the pill, but we did use protection. Should I be concerned that I might be pregnant, or are your periods really irregular after giving birth? I'd appreciate any ideas on the topic. Thanks.