Frustrated

I have waited a year as stipulated by a consultant for a colonoscopy due to severe pain and family history of colon cancer. Now im told if im not admitted they wont pay. I have found a Gastro and have an appointment on the 7th. Today im in so much pain, my entire abdomen is painful. I was told by Gastros receptionist to go to ER. Im trying to ensure that I am covered but given the run around on the whatsapp channel. I have now been asked for treatment plans and doctors practice numbers, for ER?? Im so frustrated, in pain and just need to he helped.