I injured my hip flexor (I think).
http://www.epainassist.com/sports-injuries/hip-injuries/hip-flexor-strain
It must have been during rolling. It’s been a couple of weeks. I’ve still been rolling which seems to make it worse (makes sense). Has anyone had this injury before? How long did it take for you to get over it? I’ve been trying to avoid the pain by using the other side of my body as much as possible. Of course, that’s my weak side for technique. Let this be a lesson to all of you that only train technique on your dominant side. It sucks when you’re forced to do the other side!
the end
Mountains to Mats 
Good post sir. Every mistake and injury is a chance to get better. I am so glad that you are taking advantage of it!