Maria as a parent (a dad in my case) my heart goes out to you and it is when I hear stories like yours that I am thankful that I was born in the UK. I know our National Health Service has some serious problems but at least I do n ot have the stress of how to pay for treatment or for the meds.
I know it can be difficult and somewhat upsetting, but if you are not happy with your doctor you must get a second opinion.
You give but little when you give of your possessions. It is when you give of yourself that you truly give. Kahil Gibran