Consultant Dismisses Physical Illness as Mental Health Issue

I had to see a cardiologist (Not my usual one or one of his team) in December 2022 as an urgent appointment I had contracted a severe case of flu which had flared my POTs and pericarditis. At the time he prescribe a long course of steriods which helped greatly. He also said he would refer me to a specialist in POTs and pericarditis to help with my conditions as the current management plan isn't working. Today (04/02/23) I received a copy of the referral letter he sent to them. In it he acknowledges my pericarditis and POTs diagnosis he believes that its actually anxiety and depression that I am ill. I literally sobbed as I read the letter. He implied that it was health anxiety and depression that I am ill not the case of flu exacerbating my long term conditions. Has anyone else experienced this, where a consultant writes off/minimises your concerns as mental health issue and ignores the real physical illness?