Katie --
Thankfully the pains subsided today, but they were still there (just not as frequently as yesterday). I spoke with one of my girlfriends who has two young children and she said she experienced that off and on from around the beginning of her last trimester. Thankfully it's not accompanied by abdomen pain. Thanks for posting your response on what you found with the Mayo Clinic site.... I can only describe the pain as inner-groin pressure feeling like it was moving out. But again, no bleeding, nothing out of the ordinary, no abdominal pain, and it's not frequent enough. However, I too will experience it in all positions (walking, standing, sitting, laying down). Sometimes it's super painful, others it's mildly discomforting. If they get worse or become more frequent in the near future, I will be contacting my doctor.
Thanks again... oh, and wanted to share... we don't know what we are having, but we've decided that if it's a girl, her name will be Katherine but we'll call her Katie.