Help Please !

Meara

I'm exactly 36 weeks today & I just recently went to my OB 2 days ago & I'm not dilated at all, whatsoever. Well today out of nowhere I got this really dull pulling pain in my left inner thigh, that crease between your thigh & vag. At first I was nervous because baby wasn't moving, but then he began to move shortly after. Is this a sign of dilation or is it just a nerve thing with the baby's head ?