My Practise Nurse Is Concerned About My Blood Pressure Reading.

My practise nurse is concerned about my blood pressure reading. She states my systolic reading is high usually 180+ when I call to see her. However I have my own electronic reader and I have been monitoring my pressure these past three days but the highest reading I got so far is 176/98. I also notice that my diastolic is 100+ every morning. i have been on Lercanidipine 10mg and Perindopril 4mg for a long time. I have a further appointment during the week. I have been attending her the past three weeks.