Hello an welcome!
You've received some great advice and support above...
...so I will just wish you well, and direct you to our Resources at the top of the main forum page here for great self help material ti help get you through this fear.
Look specifically at the 'Super Scanner' link to see how anxiety can lead to physical symptoms...which can then cause more anxiety...more symptoms, ect...in a cycle.
Also try the 'Stress Relieving Exercises' for management and relief of anxiety in general.
Keep posting with us as well if you find it helpful. We do understand, care...and support is key.
"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