Just that really. My periods are like clockwork. 20th of the month, every month. However, last month I was a day late and this month, nothing yet. There is 0% chance that I am pregnant. Im not particularly stressed or worried about anything. The only difference is that ive lost nearly 3 stone since January using MJ. I know changes to diet and weight loss etc can mess with the cycle. Has anyone else experienced this? I do have PCOS but since coming off the pill and starting MJ they've always been regular.