I was in a similar position about 4 years ago. Successful Deputy Head in a secondary school, spinning lots of plates, and I had a very supportive head. But I wasn’t coping. The day I found myself hiding in the toilets I knew I had to make a change. I was lucky, I effectively was allowed the job I asked for, non-teaching safeguarding lead but on a very good wage. Then a MAT took over and I managed to get a safeguarding role with local NHS trust – I was privileged to do this, fist non-health professional. However, I missed the kids and I’m now an Assistant Head in local Pupil Referral Unit, 10 minutes cycle away. I’ve been hit, punched, spat at and work 11/12 hour days with no breaks, but I do no work when I get home or at the weekend.
What am I saying? It’s not you it’s the expectations of the job, which are insurmountable. You are not failing, the education system is. Plus there are always the options – you have massive experience and a wide skill set. I hope it works out ok for you. Happy to chat if it might help.