Islay, don't freak out or worry, I only had that test a few weeks ago, it's ok, it's just the bp sleeve on your upper left arm connected to a monitor clipped on with a belt, at first it goes off every 20 mins (mine did anyway) and come nightfall, it goes to every hour, I rem my neighbour (in my old house) getting it, she was a divil, you're supposed to carry on as normal what you usually be doing on that day, I'll always rem my neighbour took to the bed to relax. She was so relaxed and the reading so unlike what they expected, they called her back a month later - it's harmless, after a little while you'll get used to it on your arm, maybe you have white coat syndrome ;)