I hope you get to pinpoint O. My pp LPs were 5,4,4,8,3,9,10. So it has slowly gotten better. The 3 day one was after a trip overseas to visit my parents in Germany. I ate so much food that I started producing more milk again, to the point where it would randomly let down even if DS was not nursing. That cycle I didn't O until CD48 and AF came 4 days later. So to me there was a def. connection between milk production and my cycle. I hope yours isn't that short. I did take some B100 complex to try to lengthen it, but at the same time we were reducing feeds so it's hard to say how effective it was.
Afm, I'm very anxious to get my temp rise tomorrow. If it's not up, I will have no clue what's going on...