"absolute waste of time"

Ive got a heart condition which has been causing a lot of pain and discomfort for over 3 months, my gp told me if it was to worsen then go to the hospital, so thats what I did, for then the doctor there said its justa bit of muscle pain and to go home, this made me so angry that he wasnt taking what I said seriously and just wanted to get rid of me. I did not sit There for 2 hours to be told something that I know and my gp knows full well that isnt the case.