Kerrie- If you think you O'd on day 20/21 and you are upto day 35, you are almost due for AF anyway! 14 days in between. I appear to have a 10/11 day luteal phase at the moment. two weeks is the majority, but not for eveyone iykwim.

Are you having any kind of symptoms?

I have msn too, so let me know if you want to chat there!