I have been on EC stack for a week now and have been getting headaches every once in a while. I have had one all day and just took my third dose out of habit even though I meant to skip it. Friday I checked it 3 different times at Walmart, I don't think it was very accurate as I got readings all ranging between pre hypertension all the way up to Stage II Hypertension, but it also says the cuff is for 12-15 inch arms and mine are bigger than that. What are some ways I can quickly lower it whenever I get these headaches? The headaches are the only sign of high blood pressure as far as I know.