Hi and

I'm Nikki, one of the co-hosts of the board.
If you are currently 3 dpo, most likely what you are feeling is residual soreness in or around the ovary that you just ovulated from.
3 dpo is far too early to be feeling any sort of pregnancy symptoms. If you happened to catch your egg, it's probably still tumbling it's way through your tube and trying to make it's way to your uterus where implantation would take place.
I have heard many girls talk about pains in and around their ovulating ovary for a handful of days after O, so it's certainly NOT uncommon. Hopefully you'll be getting very good news very soon.
Best of Luck & Baby

Hope to see more of you!!