I'm 9.5 weeks now with my third, and as I was lying in bed this evening, I suddenly felt a sharp stabbing pain on the left side of my uterus. It has been going on now for the past 20 mins or so and each pain lasts about a second. It's a very quick, sharp pain that takes my breath away. I tried walking about but that didn't help. Is this round ligament pain? I don't recall it being so pronounced with my other two and definitely not this early. Should I be worried?