CD1

[Spunkify]

after 28 day cycle. I had O pain and EWCM dried up on CD15 so that would give me a 13 day LP, right?

[tibeca]

From what I understand, it takes a day, up to three past ovulation for mucus to completely dry up. So if you were dry on Day 15, then you ovulated prior to that by 1 -3 days. That said, each woman is unique and charting only 1 month isn't going to give you all the information you need.

[Spunkify]

I don't chart at all actually. I determine an O span by CM and mittelschmerz. In years past the day I had the O pain would be the day I got the positive OPK but at that time I never really tracked CM. I did consider OPKs again recently to help me get a better idea of an O day, even if I just use them for a cycle or two.