Many thanks to all who replied!
I was going to go to the medical after taking an asprin, a beta-blocker, and with an empty stomach, (and hope I wasn't traumatised by a hairy nurse!), but instead, just took asprin.
My blood pressure at the medical was an amazing 107 over 65 !! - God knows how!
Anyway, thanks again for all your suggestions - I'm glad I found this bulletin board