A bad interview

[EmilyAlice19]

I am just wanting some words of encouragement or advice. I'm sorry if this sounds desperate, I could just really do with some support.
I've been a teacher for 10 years now and recently I've been really struggling with anxiety. My therapist thinks it's burnout and I've decided that I want out of teaching. I've put myself on the back burner for so long working 70+ hour weeks, running on chronic stress and my wellbeing has deteriorated.
Today I plucked up the courage and had an interview for a role outside of teaching, I revised and worked really hard for the interview. However, when I got in there I froze. I answered all of the questions but reflecting on my answers, I don't think my answers were in depth. I've driven home and I can't stop thinking about how I've let myself down. My job is filling me with anxiety and I feel like I can't go on. I really wanted this job and feel so disheartened.
Any words of advice would be so appreciated. How do I pick myself up?

There’s no way of predicting if you’re successful or not. It depends who else applies a lot of the time. Just keep applying if you’re not successful. Ask for feedback as well. It’s usually kinder than you’d think and gives you ideas on what to improve. I’ve been offered jobs when I interviewed badly. You just never know.

Apply for more jobs! If you are successful with this application, great. If not, then regard it as a practise run. Apply for jobs that you aren't really fussed about, go and talk to agencies, anything that will give you more experience in interview, where you aren't so invested in the result. This one loomed too large.
And don't blame yourself, teaching can suck you dry.