Returning after 8years was one of the hardest things I did in my younger days. It drove me pretty near the edge ( anxiety attacks) but I loved the income and the feeling of being back in the world again and I stuck with it. I felt a complete fraud too and out of my depth but gradually worked my way back and went on to have a good career. Not easy though. Had some really b i t c h y colleagues who made it extra hard but - what doesn't kill you makes you stronger. After 3 years a new headteacher thought I was worth promoting and I hit my stride. You've got to give yourself more than 4 days. Keep posting and stay strong. I paid a cleaner for a few years and that helped - as did the lovely husband of course.