I'm worried about my blood pressure.

I had my biennial health check-up this time. They said there are no other abnormalities, but my blood pressure keeps rising. Last time, it was just 57 over 108, which was okay, but now it's just starting to go up. Is 70 over 128 something to worry about? Or can I just relax and live normally? My family history has always made me worried about blood pressure. My father also passed away from a stroke. That's why I am very concerned about my blood pressure.