Hope someone will jump in and add to the little I know, as I'm a bit limited in testing knowledge.  Obviously, anything normal is great!  

Prostaglandin F2 is a marker for inflammation.  If it were elevated, you might need anti-inflammatory meds, but I don't know what it means if it's below normal.

If mast cell disease is suspected, it's important to rule out several other problems that can cause similar symptoms, such as carcinoid syndrome and pheochromocytoma.  5HIAA and Chromagranin A tests are run to rule out carcinoid syndrome.  Did they tell you any foods or drinks or meds that you weren't supposed to have before this test?  They might give you some guidelines to keep the pH up and try to re-do it.  

Urine catecholamines were checked to rule out "pheo."  Are you sure epinephrine wasn't "metanephrine"?  Metanephrines are also checked for "pheo."

Not sure what "undefined" epi means.

The tryptase will indicate anaphylaxis and possibly a mast cell disorder.  You can still have a mast cell activation disorder with a normal tryptase, just not SM.

Good luck!  Let us know what you find out.