I think this is not uncommon. Not only for SI/panic/terrible feelings; medical problem sometimes get the same go-round. Hey, that tooth will be OK ... or a while.
I wonder if there is someplace else to go. Because, sometimes, I know that my insides are just SCREAMING to go" "SOMEPLACE" where this will go away.
In the past, when able; I have found that swimming at night helps a great deal--in a lake under the stars, in the ocean... Or, even walking in a good storm, if one is available. Cities sometimes work----eye candy, a different rhythm.