"Complaint"

Good Morning! Yesterday, 12/29/2018 I used the English health system for the first time, Bracknell at 11.30 a. M, I went wrong. Attended. When I arrived at the GP, I asked for a bed to lie down, I'm having serious problems in the spine (I can not walk or sit), I had to wait 2 hours for the care. I was attended by a nice nurse, she confirmed all my symptoms, sharp pains in the spine, headache, high fever, cough, phlegm in the lung (mild). Although I did not do any tests to see the real problem of the absurd pains of my spine, like a simple x-ray. He directed to continue the medications he was already using, ibuprofren and paracetamol and absolute rest for 7 to 10 days. Unfortunately, he did not want to provide me with any documents that prove my visit and my symptoms. I need the document to show my manager and the company where I work. I am in a lot of pain and difficult to get back to the emergency room. What is the best way to solve this problem?