I agree with the other 2, if it is worrying you it should be checked out. I had shooting pain from groin to abdomen at 19 weeks, gave me a big fright, had it checked out and it was ligament pain..usually occurs later but can occur earlier for some lucky people. I didn't have tightenings after the pain though. I am sure it is nothing to be concerned about but any concern you have should be checked out, jic. good luck!