High blood pressure

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Anyone else just suddenly get high BP? My blood pressure has always been perfect! But I was in a fender bender the other day and went in to be monitored and they said my bp was through the roof and kept me overnight for observation. I was able to leave the next morning but they have me monitoring my BP at home and if it continues to stay high I have to go back :( I just don’t know why all of a sudden it’s an issue when I’ve never had problems before. I’m 34+6