That's not always so easy. I'm almost in the same position as you are. We lost our healthcare about 2 years ago just after I was told I may have cancer. I have looked into every avenue of getting help but always to no avail. You may want to look into the Hill Burton Act, which is supposed to help people to pay for catastrophic medical needs.
After 2 years of asking every medical professional, hospital and helpline where I can find a low cost clinic, I finally found one when a massage therapist recently told me where to call. It is rediculous, they are hidden and almost secretive. I haven't called yet to find out if I can go or not, because I am afraid they'll tell me what all the rest have told me. Our income is decent so we don't qualify for anything. The only problem is we have debt to pay (secured) so we don't have even 2 pennies to rub together at the end of the month.
The best thing I think any of us can do is to write to our politicians and keep ourselves informed about the fight to get healtcare for Americans. You might want to visit
http://democraticleader.house.gov/issues/health_care/index.cfmto get some information on what house democrats are trying to do to fix this crisis. I write letters, send e-mails, make phone calls and sign petitions showing my support of their efforts.
Most of all, just remember that you are not alone. We are becoming the majority, people with no healthcare. The most important thing I think we can do is to send a strong message to our leaders that we wont stand for this anymore!