My Head was brutal to me today…

I have a very demanding head. I’ve been under a lot of stress recently, with lots of changes in my personal and professional life… my school do scrutinies regularly and I’ve let a few things go unnoticed… I was told today by my head that I’m not the same teacher I was. Honestly I’m working at a stressful, toxic environment and been thinking of all sorts of options for my future including supply temporarily however mortgages are keeping me grounded! I just finished crying my eyes out thanks to my head. What do I do?

Thank you