back spasm with hip hinge

Hello,

I did a workout at the gym yesterday and later in the afternoon pulled my back leaning over to change the sheets on the bed.  I am usually very careful to hip hinge but i'm assuming I did something wrong.  The muscles that are tight and sore are the ones you use when you sneeze...very much at the base of the spine...erector spinae?  multifidus?  I don't know if it's a flexion extension issue but I've done it a few times in the past couple of years.  Any advice you could offer would be greatly appreciated. 

Thank you!

Lisa