You are definitely in the right place. I am sure many of us, myself included, are uniquely positioned to understand high-achieving academic anxiety.
First, this is a random unsolicited book recommendation but I would suggest reading “The Four Agreements” by Don Miguel Ruiz. I have been reading his series of books to help sooth my waiting for responses anxiety and it has helped me cope.
Secondly, if it will calm your anxiety, how do you feel about contacting either the departments graduate admissions coordinator or one of your interviewees to ask about a timeline for responses? I know for me, just knowing that I’ll hear back within certain dates helps me to delay the anxiety till those days loom.
As aspiring academics and PhD students, we have tons of anxiety provoking situations coming our way. Of course, our time before the program would be greatly spent practicing and learning some healthy coping mechanisms.
The wait is grueling and I know practicing patience is such a struggle! Be gentle with yourself.