Pain question..

I just had an extremely sharp, stabbing pain in my lower left side of my abdomen. It was like a really bad cramp, but only one side. And the pain kind of tapered off after a few minutes, but it still hurts. Almost like a really, really bad pulled muscle. It hurts bad enough still that I can't fully stand up. At first I thought it may be a contraction, but it was only on one side and still hurts. Anyone have any idea what it could be and if it's something I should call the doctor over?