Taylor, I know this may not sound very helpful, particuarly when you're properly knackered (physically AND emotionally) from the process of applying for jobs and going to interviews and then not hearing back - but I do think you are going to find something great one day soon!
It's also my experience that jobs were easier to get a few years ago, even though then I was a fairly useless teenager, than now - post-uni, I even went to a Starbucks interview with about 100 other applicants, including middle-aged men with briefcases! I did get the job (and enjoyed it, except for the "can barely survive on min. wage in London even living in a crappy flat with 5 housemates!" thing) but the whole thing was a huge process and it frightens me now I want to move into a new career soon - how can I compete against 100+ other applicants every time?!
But one thing I do know is that if you keep trying, something WILL come up. It's much more of a numbers game these days - if there's a low chance of getting a job, you just have to do that many more interviews til your chance comes. It's really exhausting
but it will be so worth it cos once you've got something, you can start to relax while keeping an eye open for possibly better opportunities - a much nicer position to be in!
Have you tried looking up organisations that are set up to help people get back into employment, no matter the reason for them being out of the traditional job market? I know certain specific ones exist to help certain groups of people (Jobs In Mind comes to mind!) but there must be more general ones - perhaps linked to your local job centre? And I know those are some dire words to hear sometimes when you're used to being a very productive, hard-working member of society and have never wanted to sign on in your life! But there may be some other use you can find from the place. And if nothing else, a bit of support through a major challenge in your life can always be welcome.