running to heal

I haven't been doing any planned exercising because my current employment is essentially an all-night workout. Right now I'm more sore than when I did a half. I've been trying to make it feel more like a workout where I get paid. Lots of squats. LOTS of squats. I don't understand how it is possible for people to be overweight with a job like this. 

I would very much like to go running, but am afraid, because this new job has done a number on my feet. Every night I am in so much pain that I can barely walk. But I just got my heart broken this night, and I need to run it out. My hope is that it won't affect my ability to do this job.