I'm so sorry for Pouncer....! It is horrible when doc refuse to do some tests, just because they think they know best
2 years ago, a doctor refused to give me a very important injection; he said I didn't need it.... . 2 months later I met him again when I was in hospital for major back surgery. I asked him "Well, still thinking I didn't need that shot??". He turned around and walked away

Good luck Pouncer!! I hope you will be helped soon!