So sorry to you have a doctor that dose not listen to you a common problem now days first of all I would find me a new doctor/ you have enough going to up with him being so rude and get a second opinion and a third opinion see what another doctor has to say or thinks
Because no one knows your body as well as you do and you know when you don’t feel right op’s sick
I have the same problem and I have IVCD I was born with this condition and a few other heart problems but things are normal they tell me so my PCP put me on nitro pills incase I need them I had very high BP and some serious chest pain shortness of breath went to ER where the doctor gave me nitro and the chest pain went away they did all there tests and they were all normal so cardiologist is just monitoring my me
If I was not in cardiact issues why did they give me nitro in the ER the ER doctor said he believed they stored me from a heart attack no matter what those test said and I agree with him I was very scared they kept me over nigh and then let me go home so me I would get other options my friend hang in there ok let us know how your doing ok have a great evening ❤️🙏