Yes - it's the stretching of your uterus ligaments - it's been the only sign of pregnancy other than some light bleeding after sex for me for both of my pregnancies. You can also have spotting or a full blown period too at around the same time - but usually it's a week before your period would usually start. Totally normal... but if you think you might be wait it out another week and take a test.
at 9:22 PM on Jun. 29, 2009