Probably the stress, but you should bring it down. From what I've read, anything over 130 is dangerous.
I too always had low BP, but in my 60s it suddenly jumped up - not from stress. Same thing happened to my sister. She took the drug route, I decided to use that as a last resort (fortunately I did it without drugs).
So I bought a BP tester and went on google quest. (actually ixquick as google tracks every move you make and sells it to anybody with a dollar.)
- Progressive muscle relaxation
- Omitting or restricting caffeine (with the exception of black tea)
- Amla (organic Indian gooseberry extract) - this took it down 10 points.
- Lowering salt
- Upping potassium
- Garlic pills
- Exercise
- Low carbs (we already do that)
- Lose weight (went LC in 2000 and did that already)
Also as a side note - a good session of delightful lovemaking with my wife also brings it down to the low teens during the afterglow.
I also took on a "Don't sweat the small stuff" attitude. I have a friend who has been battling pancreatic cancer for months now. Everything I have to face is small stuff by comparison.
I did all of the above - and doubled my exercise from 2 miles a day to 4 miles a day at a fast walk. It went from 145 +-5 to 120 +-5.
Life Extension Foundation recommends that you keep your BP under 118.
I test first thing in the morning, before breakfast (meals and exercise temporarily pump it up) and then various times through the day, graphing the results. It took a little over a month to see any results at all, and after that it was up a little down a little more with a downward trend. I guess the body needs time to adjust.
Bob