I have always had (somewhat) regular periods, and although I did have longish cycles they would always be regularly and monthly too. But in around December they began to change. I had one that was really late (19 days late) for no particular reason (I AM NOT PREGNANT).
When I did get it was normal then I had a 38 day gap and got another, unusually light period. Then to my surprise, only 12 days after that one started and ended I got another, unusually heavy period. I brushed that one off as a weird cycle, but then it only got weirder. 20 days after that period in December, I got another one. Since then, I've had 20, 28, and now today 23 day cycles. I'm so confused, it really get's me and they're quite heavy too so I'm concerned that they're happening so often. I don't know...