I Have Stage 4 Melanoma need Help

I was diagnosed with stage 4 matastic  melanoma in december. I am undergoing a clinical trial study, its an immunotheropy treatment  with monthly injections.  and it's working, my tumors are shrinking at an alarming rate. It also has caused a few side effects but, worth it if it kills cancer. Medical costs are high, thank you so much for anything you can do to help me out.