Cancer treatment leading me to bankruptcy

I have been fighting cancer for two years and have been able to handle the expenses until now. I had to change insurance and this led to double out of pocket expenses as well as double copayments. I have gone to collections for one set of bills and am in danger of going there for thousands more. These medical expenses as well as my insurance is much more than I can handle.

I have chemo therapy every two weeks as well as lab tests, doctor visits, and periodic CT scans. I participated in a clinical trial but that backfired and the cancer grew and spread. I now am also being treated for thyroid problems. 

I try try to stay optimistic and I do love life. 

These bills are now impacting my ability to pay rent and buy food.

I could really use any help you could provide. Thank you very much.