Twisted wrong and had a weird numbing pain...?

I just sat up in bed like I would normally, pretty slowly too, and got this weird pain in the front of my stomach and then instantly numb for a minute then fine, and no pain. 
 I'm 16 weeks, can't really feel baby move yet so I can't gauge if baby is alright. Anyone know what it could be? I'm kind of worried, and can't stop thinking I just hurt myself and my baby.