Do you usually get high blood pressure when you are at the doctor's office?
A 24 hour monitor will answer for sure if you have high blood pressure, or you have, only, white coat hypertension. I guess you just have the last one.
Did you have a simple blood count test?
Are you usually short of breath?
Do you have frequent spells of dizziness?
What is your normal heart rate?
Have you noticed some heat intolerance, increased nervousness or more frequent bowel movements recently?