Honestly, ladies, those of you trying to get out, I hear you - prepping for interviews felt utterly horrendous for me.
The way this worked out was I applied/was approached by recruiters directly. I was signed off with stress for 3 weeks, then went on a prearranged holiday for 2 weeks. Those 5 weeks didn't cure me but they gave me some mental clarity. When I got back, the only thing I chose to really focus on was interview prep because I really wanted to get out. Got the job. Negotiated a shorter notice period. I could've stayed on paid garden leave but honestly, I wanted nothing more to do with my ex-big boss. So I chose to get out ASAP and started my new job.
I have to say, looking for a job, interview prep and then the first 6-7 months in my new job felt horrendous to me. I was so drained, so low on energy, felt useless and like I couldn't perform, I was totally burnt out. I went through a period towards the end of my previous role when I started having panic attacks before work and on leaving, when I had to pick up my DCs. So you can imagine how hard it was to focus and find some energy to do all this. I somehow did it but if you can get out before you get to that stage, please do.
I actually really don't know how I survived the last 5-6 years. I had so many negative events in my life alongside my former job that I look back at it and feel disassociated because I was so traumatised. I don't want to believe all this happened to me. In terms of recovery, removing the stressors has been huge, but it's a long road. I had to change my lifestyle and it's still in some aspects work in progress. I still haven't recovered fully in terms of energy or mental capacity, it's been 18 months. But I am getting better.
Please, please, please don't get to the stage when your bucket gets overfilled. You never know what may happen in your life that will tip you over the edge, you can't be running on fumes all the time, it's not living but survival. No job or money is worth it.