I just dealt with something similar a few months ago. My BP was always quite low 120/65 or lower. Suddenly my BP read at 130/85 at a random doctor visit. Thought it was a fluke. 2 weeks later it was 145/85. I didn’t think my anxiety could be to blame but realized about 2 months later when an anxiety provoking situation ended that I had been in for about 8 months my BP suddenly dropped to 110/65. Stress can wreak havoc on your body. I’m sorry you are dealing with this.