I got out of full-time, state school secondary teaching a few years ago, after I woke up to the fact that I was very seriously considering killing myself several times a week in the mornings (I wanted to deliberately drive off of/into something on the way to work).
It is very all-consuming. For years, my life was only about teaching. I’d be up between 4 or 5 on weekday mornings to catch up on marking, then a five lesson day (acting all day, like a pp said), then the school I worked in cleverly introduced meetings that started an hour and a half AFTER school ended, so you had this trapped time most days (and they watched the gates to make sure nobody left beforehand if there wasn’t a meeting that day). Then marking all evening and trying to be ready for the next day.
I got to a point where I realised that I’d given everything else up (hobbies, exercise, time outdoors, seeing friends) in order to try to do the job.
Anyway, DH encouraged me to take six months out to recover and find things I enjoyed in life again. Then, I did some casual supply work for a lovely, small independent school, and I teach there part time now. It’s wonderful.
I love teaching again, and I plan brilliant lessons for my classes. And I’m allowed to have autonomy to teach how I bloody well want to without being “observed” all the time. The class sets are so much smaller that marking takes about a third of the time per class set than it would in state. The parents fucking love me, because I’m a much better teacher as a part time teacher.
Plus, since I’m part time, I have time to enjoy life again. I can use an afternoon to go for a walk, or go paddle boarding, or read a book, or DH and I can have a spontaneous day off together. It’s a fucking revelation having a work-life balance.
I’m a much better teacher now that I’m not cripplingly depressed and exhausted and in pain.
If you can, take a look to see whether you can go part time, or switch to the independent sector.