Welcome to the chronic pain forum and I too am sorry to hear your having a flare. I have extreme problems with my bp as well when my pain hits those high notes and I believe it happens to most and is a sign most drs can see.
Not sure why your waiting in the parking garage and that can't be too comfortable at all. Possibly getting your own b/p monitor for keeping a check on it at home would help. They're nowhere as expensive as they once were and fairly simple to use.
Hope you get relief soon and home.
I picked up an old-style home bp unit with the stethoscope and air guage.
I can hear the systolic, but cannot hear the diastolic when it comes through.
I would recommend one with a digital readout, although they cost at least twice as much at $60.