healthcare for low income student?

I'm a 20 year old male who is a part time and full time student. I cannot afford health care plans or dental plans. I was wondering is there any government assistance or plans out there where I can go to a doctor or a dentist that does not require a lot of money out of my own pocket? I haven't been to a dentist in a year and I want to go to a doctor for a check up but can not afford it...what should I do?
--------------------
Use your school's clinic or infirmary, or go to the health department. As far as dentistry goes, have a cleaning and checkup at your local dental hygiene school and if you need any work done you can go to the local dental school. Sometimes they are in the same place.
Source