I would suggest that you write down these questions and do not hesitate to talk to your cardiologist. I cannot give you medical advice but i can assure you that EVERYBODY'S blood pressure changes during the day and rarely has the same readings from day to day. It fluctuates depending on how active you are, how stressed are, if you ate or didn't, what you ate, whether you drank caffeine, if you took a medicine that might have raised of lowered your BP temporarily and more. Your average blood pressure reading is excellent - only slightly high. I assume you have had tests that show your heart is a normal size, EKG normal, etc. Honestly, I can't diagnose you but I PROMISE you - and ask your doctor for verification - that everybody on the planet normally has blood pressure fluctuations. Check out this article from Harvard - scroll down to the graph of blood pressure fluctuations during the day. It might make you feel better. https://www.health.harvard.edu/heart-health/experts-call-for-home-blood-pressure-monitoring

rom the National Institutes of Health (NIH): "It’s normal for your blood pressure to go up and down throughout each day. Blood pressure is affected by time of day, exercise, the foods you eat, stress, and other factors. Problems can arise, though, if your blood pressure stays too high for too long...'Hypertension is defined as having an average blood pressure of above 140/90,' says NIH’s Dr. Lawrence Fine, who oversees research on the treatment and prevention of hypertension. Since blood pressure can vary widely from day to day, a diagnosis of hypertension is usually based on an average of 2 or more readings taken on 2 or more occasions." I think your average blood pressure is doing pretty good. And I hope you will make a list of questions and talk to your doctor - make sure you understand and don't be hesitant to ask about everything bothering you. You need reassurance and for your doctor to take the time to explain about blood pressure fluctuations.