Esspee Take your blood pressure and pulse rate every day for a week. Before using the monitor, sit down for half-an hour with a book, or watch TV. Then put on the cuff, but don't switch it on yet Spend another ten minutes reading your book, then switch it on without fuss and go back to the book until it has finished measuring If you are anxious when you measure, you will get a far higher reading than you should, but giving your body time to calm down with give a truer picture.
Don't obsess about it, because "white coat syndrome" sends both blood pressure and pulse rate up, and even measuring for yourself can make you anxious, as well as sitting in th surgery. Get a GP appointment if you think either are higher than they should be.