bleeding after cervical check

J
Has anyone else been bleeding fairly heavily after a cervical check? I've had a few since I was in preterm labor a month and a half ago and spotted a little bit after my previous checks. 
I'm 38w3d today and was checked this morning. I came home and laid on the couch since the check made me a little crampy, and just stood up to discover I bled straight through my underwear and sweats. Anyone else bleed this much? Trying to get a gauge of if this is a normal amount or if I should be calling in.