Didn't have a cycle for 18 months. Then had one every 3 to 4 months. Last one was just over a month and am currently on cd38 but only 12 ish days past ov.
Blood tests and ultrasound (checking for pcos) results came back ok. So as far as I can work out the more I worried about it the worse it became my last 2 cycles have been the most regular in 4 years and that happened just as we decided to start TTC.
I think there are a lot of people out there with funny cycles esp, as in my case, they have been using 1 or another kind of hormonal contraception for a while (I came off the pill nearly 4 years ago)
Stress has an amazing effect on most womens bodies as a nurse said to me once -"womens reproductive organs are directly linked to their brains - Where as mens brains are in no way connected to their b@!ls !!!