My blood pressure has been getting steadily higher. In May 2008 it was 100/60, May 2009 it was 120/80, and today it was 124/72. I asked today if 124/72 was normal and was told that it s fine, but when I researched it I found that anything over 120/80 is considered prehypertension. My lower number is still below 80, but my upper number is over 120. Should I be worried?