Potential life altering surgery.

For the last two years I’ve been battling an undiagnosed illness which has completely taken my life and general well-being away from me. I have permanent skull and head pressure 24/7 which feels like your skull is being compressed in, leaving me bedridden and unable to function as a normal human being. After years of searching for answers and anything to help bring relief and allow me to return to a normal life, a neurosurgeon has suggested surgery on the nerves in the back of my neck connecting to my brain. The only problem with this is the surgery is 52k and my family and I only found this out a week ago. Luckily for us, we have insurance which covers 80% so we only have to pay a shortfall of 11k which is still a lot of a money at such a short notice.