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I presume, you mean "white coat"
'white collar' has a different connotation.
It is possible / but should not be brushed off like that without investigations.
Event monitors on more than one occasion may help
Some hormones (condition like Pheochromocytoma
) could present like this - need to check...
Psychological assessment and assistance may help...
Beta blockers may help - rate, pressure and anxiety
Blood pressure is often silent and can be harmful / be bold and face it / after all, it is treatable
Wishing speedy recovery