Hi. If your BP on home recordings is near normal or atleast below 140/90 and shoots up only in doctors clinic you may have what is called 'White coat hypertension' In that case monitor your BP over next one two weeks at home and maintain a dairy and see if values are with in limit Alternatively you could do what is called ABPM (Ambulatory BP monitoring) on your existing medication which will clear the doubt whether you need dose increase or not.