bBlood pressure issues!

Megan • 18 and the mother of my handsome July 4th baby boy.
Every  week when I go see my doctor they check my blood pressure and it runs right at 150/100 so they check it when my appointment is over to see if it goes down but when my doctor checks it when I'm leaving he holds my arm and wiggles it and it is back to normal. Is it ok for him to wiggle my arm while checking it? Does it give him a correct blood pressure?