I thought my appendix burst so I visited the ER on...

I thought my appendix burst so I visited the ER one day due to the excruciating pain I was experiencing. I was there 3 hours (no surgery) and received a bill for over 11,000 dollars. Nearly 8 thousand dollars billed for a 5 minute CT scan. They refuse to negotiate this amount with me and and have been no help whatsoever when I try to reach out to them by phone.