Oh, Kim, I'm so sorry you're ill and feeling so alone and like a failure. I was leg go like that when I was sick, had Meniere's Disease and couldn't drive/work because of the dizziness.

I got over being laid off/fired from jobs, realized it wasn't just "me", that I wasn't a failure, I didn't fit what they wanted or needed but that was good information to know! I discovered I don't want to be around those sorts of people, people I don't get along with, who don't "get" me. Soon after I applied for a job and put a silly looking graphic on my resume, one that reminded me of "me" and made me smile. I decided that anyone who didn't "get" the graphic, wasn't someone I'd want to work with/for. Sure enough, I got a call from one of the best set of people/job I had had up until that time.

Turn your thinking around and realize that jobs literally work both ways; going on a job interview, I use to think only of whether I could get the job, I didn't think about whether I particularly "wanted" the job because the tasks and work was something I really thought I wanted to do at this time in my life, that it would help ME to have the job (nevermind about the company, that's their problem!). I use to have tunnel vision and see it as a competition instead of having my own plan for my life and seeking out what I wanted, stepping stones, and using the job I chose for my benefit. If you have your own plan ("I'll work in a job like "this" for 2 years and then I'll find a job like "the other" to learn this skill and then. . .") specific companies or job offerings aren't so important, the focus is different.

I hope you feel better soon and can get back doing more of what you decide you want to do. I really like this book for helping me decide what I want to do: http://wishcraft.com/