155/365 - Checking my blood pressure

I can't believe it's come to this. Checking my blood pressure at home. I have always had such good blood pressure readings. But....over the last year every time I have had a doctor's appointment, my blood pressure has been slightly high. My primary care thinks it is probably "white coat hypertension" but I never used to have that. Hence, the at home blood pressure monitor. We'll see what happens.