I just went thru that this am at my doctors.
Have been tracking my BP for months at home. So, BP measured this am = 118/78.
Went to Dr office [annual physical] and it was 142/92. I haven't had a BP reading in that range since FEB. But this time I took my own BP machine in. It read 150/94. That kind of validated the "white coat syndrome". Dr said it's not that high and not to worry about it as my trend (I chart the stuff out) is in the 120/80 or lower range.
Good thing is that my own machine was a little higher than their manual process, so it validated that my tracking history is a pretty good. I also know that I have the white coat syndrome - for no apparent reason - and I need not worry about it.
You may be in the same boat