Something has been doing on the last 20 minutes or so, and I'm trying not to freak myself out. I haven't had any cramping or pain or bleeding at all the entire pregnancy, so this is new (I'm 31 weeks, 5 days). I'm having like tightening/pain all over intermittently. I thought I needed to use the restroom, but I nothing happened there. I'm drinking water and trying to stay still at my desk for now...