I was in the same boat. After graduating with my MA, no jobs in the education / history sector, so I drove a forklift on the night shift at Home Depot, and sold cars during the day at GM to make ends meet. In the meantime, I was applying for my PhD at various universities.
Now I am almost done that. Funny thing is, it may take me time to get a prof job, so I may be selling cars again as I apply for a job in my industry.
Sometimes it is a hard road, but you gotta be an adult about it and suck it up.