Definitely high cortisol. It’s happened to me too. I had my heart checked out a year ago. ECG and echocardiogram. Was all good. My heart beat was 130 too at this time.
Was told that it was just anxiety. But would be the high cortisol.
Now my heart beat is pretty much always 60 beats per minute and sometimes 70. The high cortisol stuff can come when I’m in a downswing, but it will go for good once you get better.