I had my DD almost 11 months ago, and AF became regular after about 8 months, then I went back on BCP and again it went a bit haywire, so 2 months after starting BCP im back to normal. Id say that its a combination of your body going back to normal after the birth and that you went on and off the pill again in a short amount of time that has sent your AF cycle haywire. Give it another cycle or two and you should find that you will be somewhat regular again. BOL with ttc!