Hello Freefallin: I'm so sorry you're in such dire straits! It sounds dreadful. Back when I was employed, I was a vocational counselor. So I know a few things about job search. Something appears to be wrong with yours. I can't tell what it might be from your post. As you say, you appear to have done everything right. But something is keeping you from achieving any success. I'd be glad to communicate further with you about this if you want. Send me a private message.
You mentioned having an interest in the medical field. Could you work in a hospital or nursing home setting?
Anyway, let me know if you want to "talk" further. I'm going to be thinking more about what you have written & if anything further pops into my mind, I'll write another reply. My very best wishes to you...