Hi, I have a post further down of a test I took yesterday, and was told it was positive, then in the evening I took a other which I think was negative. Took another one again just now.. And I'm not sure if its positive again or not. I'm getting confused as I'm new at this. How long do you take + opk's for before ovulating and what day would I be past O, currently on cd20. Sorry I'm a bit useless with these opk's x