Hi and welcome to the board!
I definitely went through what you are going through - I delivered my son after a few days of getting diagnosed with pre-e and then was re-admitted to hospital for high bp two days after release from the hospital and stayed for another week or two.
For months after my son was born I would get anxious when my bp was taken at doctor visits, I would explain to the doctor that I was anxious, and then he would take it again after talking with me for a few minutes and it would be lower. Anxiety surrounding bp readings was so intense tho in the beginning....i remember especially the sound of the squeaky wheels of the bp monitor wheeled from room to room at the hospital. Every time I heard that my heart would race.
I wish I had some words of wisdom about this, I guess all I can offer is empathy, and reassurance that it does get better!