I'm 42 which is only about 2-3 years earlier than the norm for Hypertension. To be honest I found it more unusual that in the previous few years I had asthma clinic check ups where they do a routine BP check which were said to be fine which seemed odd since my anxiety was worse back then and I felt pretty amped up at the time
My anxiety is always worse for about 4-6 hours upon waking and since the BP checks fell inside that I did explain it could be a reason but they tested later several times to get around it. It's worth them knowing if readings can be influenced by anxiety.