I get O pains... it's a sharp pain around my hip area. For me, if I cough, sneeze or laugh hard... the pain gets worse. This cycle I got pretty intense pains. Whenever I got up off the couch, they would intensify. Once I was up, and moving it was fine... but that initial up and down from the sofa...

that hurted!
From the location you're talking about, coupled with your temps doing a nosedive... I wouldn't be surprised if that's exactly what you're feeling.
As for length of time... it varies from woman to woman. They can last anywhere from a few minutes up to 48 hours. So it's really different for everyone.
I can't wait to see today's temp. I'm hoping for a spike!!