((((Squiggle))))

Ok, now is the time to go back and process your thoughts around this particular email.
You said that you knew she would respond "She always does," so try to feel back into where you were while you were agonizingly awaiting her response.
What made your mind panic?
How could you have used what you logically knew to soothe yourself at that time?
If you have to write another deep email in the future, how can you cause yourself to not go into a panic?

Seriously, by doing this type of processing when I freaked out with my T not responding to my hard emails, I was able to help myself in the future. It is worth the work.