Sorry to read of your struggles. i nearly skipped to reading the next item of interest but i recall how important it can be to echo "hang in there, as bad as things get, know that life is cyclical and it will get better, given time, perseverance, and reflecting"...aka 'always darkest before dawn'.

I cannot advise on the job, but the sooner you can communicate your burnout/work-behind status, certainly the better to improving your day.