I was homeless for most of my adult life up until about a year ago. I felt like a huge failure, entirely worthless. There's not much more that made me feel invisible than sitting on the street, needing a shower and food, and watching people pass around me like I'm not there. Being homeless is like dirt--it sticks to the skin. Leave it there long enough and it's hard to wash off. I've lived in the same apartment for almost a year, and it's hard to feel stable. So whenever it's possible, take care of yourself, love yourself.
I used Facebook to couch-surf with people that I knew and had a good friend of mine give me references from people she knew and trusted that I hadn't met. I spent a while living in a car, but I was employed at the time and worked night-shift. So once a week I paid for a night at an extended-stay motel to do laundry and take a shower: no one at my employment could know I was homeless, as they had a history of firing people who became financially insecure or were just flat-out living in their car (I'm still not sure how that's even legal).
My sister was able to get a free room and food for quite a while by being a full-time care provider for an elderly woman. They weren't looking for a nurse, just someone who could live in the house with her and help out. No rent and no utilities and they paid her $400/month or so on top of it. Before she turned eighteen, she worked on farms outside of town for a bit of money and a bed. She was able to befriend the farmers, and they'd ask for her back as often as possible.
I don't know how many states they're in, but if you can find a Goodwill, they can help. The job connection services has a lot of contact built up. They offer free usage on computers for job hunting and they'll help you with a resume. When my employment specialist learned I was homeless, she dug up a bunch of paperwork she'd put together (I guess she saw my situation a lot) and gave it to me: it was a list of all the free services provided by non-profits and churches. Everything from public showers to open beds to food banks.
I hope things get better soon. :')
Edit: Forgot to mention, I did everything I could to keep my cell phone on. It took a while before I can even buy it, but when I did, I paid the bill every month--even if it meant scrounging for change. It is so much easier to find work and shelter if you can keep an active phone number. Aside from my partner, my phone was my most important possession.