Anxiety about taking my blood pressure

I gave extreme anxiety about my BP being taken even when I take it myself at home. As soon as I put the cuff on I start to feel it going up and my heart beats faster. I took several readings at home over 2 days, my highest reading was the first reading and it was 155/90 and my lowest reading was 121/81. I also had an endoscope done at the hospital and I wasn’t focused on my BP I was focused on the procedure even though my BP was being taken through the process every 5 minutes. After it was all over and I was just about to leave I asked the nurse what my last BP reading was and she said “ textbook 120/80. So when it’s taken when I’m not thinking about it it’s normal. I would like to hear from others who experience this same problem when they take it at home as well as the drs office. - Thank you.

Why do you feel so anxious?