I am 16w+4 with DC#4.
At my booking in 8w ago my BP was 140/80.
At my 16w it has risen to 149/90.
The MW measured it twice and used two different machines and seemed to look alarmed 
I have never had any BP problem a before and it has always erred on the low side of normal, even throughout 3 previous pregnancies.
I was shocked and a bit upset after the app - all she suggested was I go for extra BP monitoring.
I've tried to consult Dr.Google but a lot of the info relates to later pregnancy so I'm a bit worried in car it goes up and up and up 
I don't even know what I am asking. Should I worry at his stage or try and put it in the back of my mind? Does anyone have any positive experience of high BP?