John...not to discount what your doctor said...but was she more specific about your BP? Is it rising too much during exercise? The thing is...BP is supposed to rise during exercise. Exercise is stress on the system, but it is a good stress. It improves our BP in the future.
On the stress part...I can attest that stress is a really thing when it comes to elevated BP. I saw my cardiologist about a month ago and my BP was higher than normal. Something like 145/90. Not good. She wanted me to go back and get a BP check a few weeks later. In the meantime, I did some things to improve my stress...breathing exercises (about five minutes a day), turned off the TV an hour before bed, some walks everyday, hot bath soaks with Epsom salt (hot bath soaks mimic exercise and a 20 minute soak can do wonders in the BP department). About a week of doing these things, I went to my primary and my BP was 114/71. Yesterday I went back to the cardiologist, in the afternoon, and my BP was 120/80.
Anyway...maybe add a couple of things that help reduce stress and hopefully they will help. We only have one ticker...we have to do what it takes to keep it healthy. Unfortunately, I don't think doctors always have the answer.