I monitor my BP twice a day. My average over the last nine months is 112/72, but I've seen it spike as high as 150 right before doing something demanding. Example: before flying boss on business trip (last week) - 150/80. Before flying family to beach for Memorial Day weekend (today) - 96/70. These two days were similar in that I did not ride to work. I may have felt the same on both mornings, but the numbers show one was more stressful than the other.
A home BP monitor won't be as accurate as the one in the doctor's office, but it costs only about $100 and as the only way to understand what your BP is really doing. I've found that the two variables that most affect my BP are stress and whether I just rode my bike.
Paul