Hi there ~
There may be more to your problem than anxiety
. I am sure they ran all the labs on you and found nothing and you were given the diagnosis of anxiety. If your labs and imaging were normal, you probably had an anxiety attack or a panic attack
which can in many times simulate a heart attack
or a brain attack. I think you should practice relaxation exercises and maybe even yoga
and pranayama. This should helps with the acute anxiety. Medication prescribed by a psychiatrist
are certain to help in the short term.
I hope this helped. Take care and have a lovely day !