single mom needs emergency testi25

I had taken a really hard fall and went to the doctor because I was in a lot of pain with my back and having headaches so he sent me for and MRI for my back and my head. I do have epilepsy so when I received a phone call at 6:30 in the morning from my doctor before office hours with a urgency and his voice telling me they found a tumor behind my sinus cavity and my optic nerves and I needed to get it checked immediately. I of course panicked and went for the testing got the results , I was told I was going to need a 12 to 13 hour surgery to remove the tumor so I got a second opinion and he wants to sell me for more testing by the end of the week but unfortunately my insurance doesn’t cover it all and I cannot afford it and I need help please!!!! My poor son keeps looking at me and telling me he doesn’t want me to die I can’t sleep at night I need to find out what is going on please help me!!!