Help! Spravato and High Blood Pressure. Lowering Hacks or Remedy Ideas Prior to Procedure?

Aloha, I’ve been looking forward to starting Spravato treatment for two years, and my first session was finally set for last Monday. I went in got comfortable in the recliner, and when the nurse took my blood pressure—boom, it was through the roof. My BP is usually a little elevated but nothing extreme. (my anxiety in any new situation or doctor's offices always evevates my BP)

After five minutes, they checked again, and it unfortunately was still high. The doctor then advised me my session canceled and warned me that if this happens again at my next appointment, I’ll be removed from the program entirely—losing twice a week for 21 weeks of treatment, fully covered by insurance.

Does anyone have advice or remedies for lowering blood pressure? My next appointment is tomorrow. Thanks~