"loud" heartbeat after panic attack; what to do?

Hello!

On the regular my anxiety rises pretty high. A few times a week it's close to a full panic attack. I have a raising heartbeat, losing control of my body, lightheaded and I want to flee. I try to go just through it.

So after a moment like this, my heart is beating "loud". It's 70/80bpm, so not too fast. But I feel it constantly on my chest and sometimes in my muscles. It constantly remembers me of the anxiety I had today and it's hard to go through my day with this pounding.

Does anyone has some tips, how so make the heartbeats a little less loud? Does the breathing exercises help, a shower, etc? I tried that, but for now it's not working unfortunately.

Ps: excuse, English is not my first language so sorry if I describe it weird.