I am 39 weeks, and recently developed a weird symptom - intense pain right in my inner thighs closest to my pubic bone. It's mostly been intermittent but intense twinges, but yesterday I had it that lasted about a full minute and hurt so bad that I literally couldn't stand up straight. They feel like the charley horses you can get in your calves in the middle of the night, and they SUCK. What is this?! I can't find anything online. Is this possibly a sign of impending labor?