Pin-pointing ovulation?

Question

I'm a little confused about which day I should assume I ovulated. I've been charting this month and taking my BBT it says I ovulated Monday but I got a positive OPK on Tuesday so I thought I might have ovulated on Wednesday... I do take my temps at different times of the night due to a little one still waking up in the night...

Whats your thoughts?

http://www.fertilityfriend.com/home/20d56b

Answer 1

it is really hard to do, if all else fails....try an ovulation kit!  good luck!

Answer 2

I would think on day 21.

http://www.whenmybaby.com/basalbodytempe...

that helps to adjust the time if it's alittle off.