hi, i'm not sure if this is the same thing you've been experiencing, but i had a awful sudden, sharp stabbing pain which felt like it was near where my ovaries are, a few times in the last month. it would just come upon me, once when i rolled over in bed, putting my make-up on, and even getting in the car. it was so painful all i could do was stoop over the sink or just lay still or sit still till it went away, daring not to move.
i saw my gp who said it was ligament pain and quite common. fortunately (fingers crossed) it's since gone away and i only experienced this about 5-6 times.
if it is the same thing it was very painful but they told me not to worry.