I had the same thing a few weeks ago. and still get it every once in a while. I went to er and they sent me to L and d. they told me it was round ligament pain.

Sounds like round ligament pain. I wouldn't go to the doctor unless baby stops moving for an extended amount of time, you start bleeding bright red blood and contractions begin (not talking about Braxton Hicks either which can easily be cured by drinking water and putting your feet up or laying down to relax).

That's when I started to get my pains the hospital just told me its my body preparing for labor nothing major, if you can hold out until the morning is do that and call your dr!! It's always best to be safe!