How to have incomprehensible supernatural peace

Don't be anxious about anything, but pray about everything, thanking God, asking for good and the removal of evil, and God's incomprehensible supernatural peace will protect your mind and emotions.
~My paraphrase of the Apostle Paul's words to the church at Philippi.

Right now, as I write to you, I'm experiencing incomprehensible supernatural peace.  It's incomprehensible because none of the things I was worried about this morning changed.  (It's now 4:34pm.  This morning I was so worried I couldn't sleep.)  It's supernatural because it's from God, a direct answer to prayer.  This is how I know that I'm experiencing incomprehensible supernatural peace.

When I worry, I'm sure I do what you do:  I keep thinking about some problem that I have no control over.  That's what was happening this morning.  I'm having a deadline issue for a new job I'm applying for, and an unexpected setback in meeting that deadline.  And I can't do anything about it because it's Sunday.  So I have to wait until tomorrow; today I'm supposed to be relaxing at home.  It's one of those situations where I did everything well ahead of time to avoid the exact anxiety I was experiencing.  This morning I couldn't stop thinking about how angry I was with the registrar's office of my university.  All I need is a conferral of my masters degree...a degree I worked hard on for 4 years...in which I have 75 credit hours, when I only needed 66...in which I have about 520 clinical hours, when I only needed 500.  My financial aid is paid.  I applied for the transcripts on April 30, 2018, well in advance of grades posting...and I requested that my transcripts would be held until my degree was awarded.  I got my transcripts yesterday (Saturday), but the conferral date wasn't on the transcripts.  (How hard can it be to write something like:  Degree conferred-May 2018?  Or Degree earned-May 2018?)  That's all I need--for a new job I just got hired for, and to apply to take my licensure exam.  But I have to wait until tomorrow (Monday) to talk to the registrar about the discrepancy.

I felt anxiety.

I prayed.

I asked my wife to pray.

Now, I'm able to write you without this issue plaguing my mind.  Nothing has changed.  In fact, I received information that increased my frustration.  But I actually don't feel stressed, and I can't explain why...other than the prayer.  I'm able to enjoy writing you, to read two new books, to watch some shows on Netflix, have good conversations with my wife, and enjoy a silent solitary Sunday...though nothing has changed.  There is no natural reason I'm not feeling anxious.  No natural or logical explanation.

For me, the key to anxiety is not being able to stop thinking about a problem that is out of my control.  And as long as the problem is unresolved, the anxiety remains, or increases.  But that's not happening.  I'm not thinking about the unresolved problems. 

How is this possible? 

This is how I'm experiencing incomprehensible supernatural peace: 

I prayed.  My wife prayed.  God gave me unexplainable peace.