Would you describe the pain as severe? Does it stop you in your tracks, take your breath away, make you double over, etc? If so, head to the ER. Or if you start to bleed heavily, head to the ER. Otherwise, I would just wait it out and assume it's a bug, unless you start to spot or bleed. If that happens in addition to the pain, then I would call the doctor.
at 12:44 PM on Mar. 7, 2009