I'm not 100% sure on lp as I can never be 100% sure on my ov day, this is one reason I started temping. But I'd say 14-15 days. I'm on day 14 today and ff and my other period log (been using for months) both say due on tomorrow. Obviously this being my first month charting my bbt I don't know what's normal for me, I might just get a huge drop tomorrow then come on x