I am sorry you are feeling unwell with those scary symptoms. It is very challenging when the anxiety speaks louder than what we know to be true. (from the doctor's reports/tests)
Reading and going through the exercises in following link should help!www.get.gg/docs/SuperScanner.pdf
You are going to be alright. Work the skills and use your positive mantras.
Peace and progress,
"Courage is not the abscence of fear, it is feeling afraid and doing it anyway!"
"Worrying does not empty tomorrow of its troubles...it empties today of its strength."
Corrie Ten Boom
Panic Syndrome recovery due to CBT