First off, youre not helping things by putting it off. Get some answers asap, so you know what youre dealing with. Cancer is beatable if you start soon enough. Most states have help available for people without insurance. I would think that some of the clinics or hospitals in your area could refer you to some resources for help. You are very young, and you need to get this out of your way so you can get on with the rest of your life. Waiting wont help anything, if my wife hadnt pushed me to see a doctor for the swelling in my throat last year , I probably would not be here to write this to you today. Dont wait another day.
Best wishes and good luck,
Mike