I agree, I wish you had monitored your blood pressure prior to starting an exercise routine. However, it's unlikely your elevated blood pressure is due to the physical activity. If I had to guess, I'd say your levels were high prior to starting the exercise.
Check out this post - Low Blood Pressure After Exercise
I encourage you to consult with your physician, stick with your exercise routine (which will help you lower blood pressure levels), and take additional steps to lower blood pressure - High Blood Pressure: 9 Steps to Rein in Skyrocketing Numbers
All the best,
Lisa Nelson RD
7 Natural Ways to Lower Blood Pressure
Simply maintaining helth, walk half an hour or one mile is enough. A research report told us that walking speed should 100 steps per minute.