I have not really had one since prior to starting paleo at the end of January. One day of spotting a month into paleo, but nothing since. Not pregnant, and have had issues with cycle regularity since going off of birth control two years ago. I am pretty sure between years of eating disorders, a little flirt with veganism, and the hormonal birth control that my body is beyond confused. I am definitely getting enough calories and definitely not getting too much activity. I've had blood work done, but it was through my insurance and their conclusion was that everything is normal and I should just go back on the pill, which I'm not going to do. So I wait and eat more liver and wait some more...