I went to the cardiologist 2 weeks ago for the same thing. Did and echo and stress and all is normal. You are going to have to convince yourself it's anxiety and nothing else. Your cardiologist will give you temporary reassurance and then once you don't feel good again, what? Doctors would never let you out of the ER if something was wrong. This is all in your head. Believe me, I go through this every single day. Message me if you'd like

Anxiety is natural and it is real. Here are three things to do every single time you start wondering.
Get hydrated. If you are mildly dehydrated, just the thought beginning is enough to start the usual roller coaster ride, especially when you're already "wondering".
Move around. Exercise. Do something physical, whether it's walking a short distance, tapping your toes, touching your hands. This will help the anxiety symptoms to go away naturally fast.
Breathe. Count your breathing. This will help you find the balance.
Learn how your anxiety works for you. (Yes, it does work for you, it got you to the doctor to get checked out). Keep a journal to help you connect the thought patterns and sensations and symptoms. You will also find what works best when.
Practice in front of mirror with a saying that you can use every time you think "wondering" thoughts.
You are not alone. Best wishes.

I agree with everything above...also do something to distract yourself...anything..just so you are not thinking about the anxiety every single minute.

Work on building your coping skills toolbox so that when you have another panic attack you'll be able to soothe yourself and skip that trip to an ER. It's not easy and takes practice. Practice when you're just a little or a lot stressed. In time it becomes second nature. I can usually divert a serious panic attack by trying to regulate my breathing by taking deep breaths, smelling scents I enjoy (lotions, essential oils), holding ice cubes in each hand, listening to calming music I have on my phone for that very purpose, screaming into a pillow, punching a pillow. There's lots of things one can do you just have to give it thought as to what might work for you. It's not easy but in the end it can be worthwhile. Lots of support.

Thanks everyone. As much as I say it, its true. It is reassuring knowing that Im not the only person who suffers from this illness that I consider a battle with myself. Thanks so much for the words or encouragement.

You are NOT alone! Hugs!!

The visit went well as expected. Clean bill of health so last night was a calm one for me. This morning less than 5 minutes into my drive to work, another attack, although not as servere.

You aren't along he. Panic attack s are no fun. I havevthem a lot in winter and this week has been hard.