ok, I've only been charting for a couple of months and now I'm seriously confused. I've been getting a rise around cd20, but this month it looks like it was cd17. BUT I got +opk's on cd17, 18, 19 and 20, with finally a negative today (cd21). FF says I ov'd cd17. But what are the opk's doing? The rise is only slight, following a dip. so my temps are only just above my coverline from previous months (if that makes sense)
Any knowledgeable charters know what's going on??