What I would like to do is give a month’s notice now, and that should give me time to find something by the time a month has gone by, as well as additional motivation on the job hunt. My husband doesn’t want me to do this, as he fears (reasonably) that if I don’t find something in time, we will end up struggling financially. I know this is the more sensible approach, but I can’t handle it here any more; my life is draining away, and I have already given way too many years of my life to this job that I thought would be temporary until I found something better.
There is a lot of advice saying to stay with the job until you find something else. This is reasonable and conservative approach. However, if you are as miserable as you say you are, it may be prudent to leave. Before you do so, you need to carefully analyze your financial situation.
If you were out of work for a substantial time, how big of a struggle would it be? Would your mortgage or rent be a risk, or just some luxuries? Could you rely on part time work if necessary to make ends meet?
Before giving notice, consider waiting a month, and save as much as possible. Try setting your salary aside and living off strictly your husband’s. This would give you a feel of how comfortable you’d be in the worst case scenario.
Also, consider tapping into any employee assistance programs you or your husband’s company may offer as benefits. You mention anxiety, and certain therapies or medications under a doctor’s supervision may help you better manage this condition and make your current situation easier. It is important to discern if your anxiety is caused by a toxic work environment (where leaving and finding a new job will improve the situation), or whether the anxiety is caused by some other circumstance (where it will follow you to the next job).
Your physical, spiritual, and mental health is at least as important as your financial stability. It is important, however, to carefully plan any career moves so that financial instability doesn’t further exacerbate your current feelings of being overwhelmed.