If you do not qualify for medicaid, go to your local hospital's business office, and ask to apply for financial help. When my husband was going through this same situation, they were willing to let him go to any doctor under that hospital. He still had to pay for x-rays, labs, and meds, but just getting him to the doctor was a major feat.
As for meds, check out GoodRx. It doesn't cost, and this program finds prescriptions at their best price nearby. For instance, I recently needed to pay for my prescription through health insurance, and yet I found it for the same price using GoodRx! (No, I promise I'm not getting paid by them. I'm sure there are similar programs; this is just the only one I'm familiar with.)