K.S.
She might think about visiting one of the medical clinics like CareNow as a private pay patient. If you call around, there are also family doctors that will take uninsured patients. That way she can get to feeling better, since applying for insurance will take weeks or longer. There may also be some programs thru JPS Health Network if she lives in Tarrant county.
http://carenow.reachlocal.net/HealthySavings.aspx
http://www.jpshealthnet.org/services/connection.asp
If she's not old enough for Medicare to kick in, then she can apply for an individual policy with a range of companies like Aetna, BCBS, Unicare, etc. Many of their websites allow you to get online quotes. This website was also helpful, and the staff answered my questions by email...
http://www.insurancemakesmesick.com/