20 odd years of my cycle and I am normally bang on 29 days.
I honestly think that if I hadn't been a runner / cyclist and hadn't done sport, the diabetes would have shown up earlier. I think doing the sports I do has managed to bring my BS down which has meant that instead of crashing completely in a matter of 1 - 2 months, my body took longer.
And I think with the constantly elevated sugars then I think my body has just been trying to protect me (and a baby) by not even probably ovulating properly. And that's what's been pushing my cycles out.
They did an LH test at the doctors and it picked up on CD12 that my body was working towards ovulating but I must have OVed later because I was so late. I noticed a difference last month in my AF - much much lighter, but longer and 3 days late. They said (before AF even came) that there is no way I would have OVed in the last couple months when my body was so ill. That was definitely noticed in my AF.
This month, while 7 days late, it's also much more how it used to be.
So I think it's just my body like...normalising. Its not being starved or killed so it's not in dying mode and I bet it's just trying to sort itself out. I guess it's a big decider on falling pregnant.
It will let me fall pregnant when it feels ready.
I trust it. Poor old thing :)