Hi Kerry,
I used to feel ovulation quiet strongly. It got so uncomfortable that i had to sit down slowly. My mood used to change heaps to. Poor husband didnt know what hit him when i ovulated lol. It did only last a couple of days though, maybe three.

Hope this answers your question. As far as im aware when the pain is there then your ovulating. Judging by my falling pg id agree. Go for your life when you start feeling that niggle i say.
Good luck