Also drink lots of water, but I'd still call the dr.
How far along are you? Does the pain come and go? You said it's where you get period cramps, does it feel like period cramps? Get in the bath, see if that helps, pay attention to the cramps/pain... can you time them? If you arnt 37 weeks yet, do all I just said but if the pain doesn't go away in the bath, call your docto/L&D.