I am really happy to hear that you were able to manage that herx without anxiety.
It sure makes a big difference to know you're not crazy and that there are others who completely understand.
Those heart palpatations sounded scary. You're brave for dealing with them.
Hope the next Herx (if there is one) isn't as bad.
The silver lining to a Herx is that it means those stupid poopy-headed bacteria are dying!
Peace and health to you!