Hi Civic and welcome.
I am sorry that you are currently experiecing so much anxiety and the resulting physical symptoms, as they are really frightening and uncomfortable.
I encourage you to keep talking with us, read up on other's posts and get comfortable here with the site including checking out the Resources
that Kitt mentioned.
Here is a link straight out of them. These are really effective stress relieving exercises, that if practiced daily, should help a lot. http://www.stress-relief-exercises.com/
You are doing all of the right things...going to your doctor for help, reaching out here...and along with these coping skills, you are surely on your way to finding recovery.
Looking forward to getting to know you better.