Spikes in High blood pressure?

Ok I normally have very optimal or low blood pressure 120/80 to 90/60, then all of a sudden one day I felt very dizzy and confused, my arm hurt, so I took my blood pressure and it was 172/102! I went to the dr. and they said everything was fine, just anxiety. I have a history of anxiety attacks, but NEVER elevated BP during the attacks. I thought it was just a fluke, but it happened again. Same feeling high BP. Once it subsides, my BP is back to normal or low. Does anyone know what might cause this? Anyone have a similar problem?

Yes, I have has spikes as high as 190/90 followed a few hours later by 120/70. My BP goes to 160/80 on going into the doctor’s office and goes down to 130/70 in 30 minutes.

I am in a fight with anxiety