To go back to school, or not to go back to school.

I don't know why....this happens a few time, the problem is the feeling is stronger this time. I want to go back to school.....sometimes. I feel that I am always in the same type of job, a little unstable. Production can move at anytime, anywhere. Do I really want to put my self through that, work and school? Can I handle work and school? Cause there is no way I can not work full time. I am afraid....that I would be taking on to much and fail. Do I really want to have homework at my age? These are the questions that keep rolling around in my help. I have no idea what I am going to do, but I need to make this choice once and for all soon......any advice?