There is no guarantee that because you are sending them something that they won't garnish. Have you signed up for a free, no-obligation debt consultation with one of the debt counselors on here?
They will be able to discuss your situation and explain the options available. I know that some people have been able to start working with a debt consolidation program and an affordable monthly payment has been negotiated for medical collections. This gets the C.A. off your back and you can breathe a bit easier.