Whats the best option/insurance for a doctor?Im 20 yr old male in Texas?

I haven't had my yearly physical in a few years,I need braces,I think I have a scratched cornea and I need to see a doctor and when I tried to sign up for medicaid they said I was too old so now I have no idea what to do .I live in a low income family of 4. i dont wanna just straight up go to the doctor and pay the huge fees .... what options do I have to see a doctor? =/ Thanks