Hiya, I recently went through the same thing, needed to leave, couldn’t leave till I had a new job. Anxiety through the roof, doubting myself etc.
you have my sympathy, it’s really daunting and horrible adding a job search to your list of things to cope with. I can’t offer any reassurance really, my job search was hard work, lots of false starts, people not calling back, left field interview questions that left me feeling like crap when I couldn’t answer etc.
what I did to get through it was take some leave from work and just spend a large chunk of time applying for stuff and dealing with the admin. Miserable. But it’s over now.
anyway in my desperation, I ended up taking a job which was kind of a step back (less money, less stress, easily met the requirement due to past experience etc) which gave me some headspace to look for what I actually wanted, and hey presto, 6 weeks later, when the pressure was off, I got offered an amazing job.
for me the bit that was important was leaving the job I hated, at all costs. Once that was off the plate, anxiety reduced and things got easier. Don’t give yourself a hard time thinking you must apply for the perfect job, give yourself time and be kind to yourself. Solve one problem at a time if you need to.
don’t know if any of that is helpful, I just wanted to say , I know how you feel and it will get better xxx