i'm not pregnant either but i'm having the same exact thing.
i ovulated on the 14th and i started to have very mild cramps before and after that. they come and go all day long. and for the past couple of days i've had a very heavy, full feeling in my abdomen. have no idea where it's coming from.
i actually took my first round of clomid this cycle, so i wonder if that has anything to do with it.
i've heard that sometimes people get these symptoms in early pregnancy. but i don't want to get my hopes up since i can't test for another week or more. if you ovulated on the 8th, you may be able to take a prenancy test .... just to be sure
good luck and please let me know if you find an answer to this.